CN104930460A - Light emitting device of LED (light emitting diode) desk lamp - Google Patents
Light emitting device of LED (light emitting diode) desk lamp Download PDFInfo
- Publication number
- CN104930460A CN104930460A CN201510313662.9A CN201510313662A CN104930460A CN 104930460 A CN104930460 A CN 104930460A CN 201510313662 A CN201510313662 A CN 201510313662A CN 104930460 A CN104930460 A CN 104930460A
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- Prior art keywords
- emitting device
- led
- lens
- plane
- light
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S6/00—Lighting devices intended to be free-standing
- F21S6/002—Table lamps, e.g. for ambient lighting
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- 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
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
- F21V13/10—Combinations of only two kinds of elements the elements being reflectors and screens
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
The invention belongs to the field of LED lighting devices and particularly relates to a light emitting device of an LED desk lamp. The light emitting device of the LED desk lamp comprises a mounting panel, an LED light source and a lens; the LED light source and the lens are mounted on the mounting panel; the middle of the lens is provided with a lens cavity with one end open, which covers the LED light source; the inner side of the lens cavity serves as the incident plane of the LED light source, and the outer surface of the lens, which is opposite to the opening of the lens, serves as the exit plane of the LED light source; both the incident plane and the exit plane are provided with a large-curvature unit and a small-curvature unit in the longitudinal direction, the large-curvature unit of the exit plane corresponds to the small-curvature unit of the incident plane in position, and the small-curvature unit of the exit plane corresponds to the large-curvature unit of the incident plane in position. Compared with the prior art, according to the light emitting device of the LED desk lamp, incident light can be inclined to the large-curvature unit of the exit plane so that light spots formed on a lighted surface can be deviated correspondingly forwards. Therefore, a lighted region can be closer to the reading area of a user, direct contact between eyes and the light can be avoided, and dazzle can be effective eliminated.
Description
Technical field
The invention belongs to LED illumination device field, be specially a kind of light-emitting device of LED desk lamp.
Background technology
Have a series of advantages such as color rendering is good, light efficiency is high, long service life, energy-saving safe due to LED illumination device, LED illumination device is widely used in room lighting field by people.
Application LED interior illumination fixture in, LED desk lamp be comparatively commonly use lighting apparatus, because people can use desk lamp to carry out reading or the work of long period, how to improve desk lamp illumination comfortableness, be the emphasis that those skilled in the art research and develop always.Existing LED desk lamp adopts traditional light projector mode owing to being subject to the restriction of structure, the lamp holder of desk lamp is generally needed to be inclined upwardly when people read, make light can invest the reading of oneself or the region of work, but the mode of this lamp holder that significantly tilts, the light of direct projection human eye can be produced, cause serious dazzle.Add the feature that LED desk lamp light source emergent light presents central light strength and sharply successively decreases towards periphery, the uniformity of illuminance of emergent light spot is low, causes very uneven of the brightness in the user visual field.Therefore, existing LED desk lamp not only easily causes the visual fatigue of user, and Long-Time Service can affect the eyesight of user.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of light projector direction to lean forward, the light-emitting device of the LED desk lamp of dazzle of showing up evenly, prevent.
In order to solve the problems of the technologies described above, the present invention by the following technical solutions: a kind of light-emitting device of LED desk lamp, comprises installation panel, LED light source and lens; LED light source and lens are installed on installation panel, are provided with the lens cavity of a side opening in the middle part of described lens, the coated described LED light source of described lens cavity; Be the plane of incidence of LED light source inside described lens cavity, the outer surface that described lens are relative with its opening is the exit facet of LED light source; Described exit facet and the plane of incidence all have Daqu along the longitudinal direction and command troops and small curve portion, and the Daqu of described exit facet is commanded troops corresponding with the position in the small curve portion of the plane of incidence, and the small curve portion of described exit facet is corresponding with the position that the Daqu of the plane of incidence is commanded troops.
Compared with prior art, the setting that the present invention is staggered by the large and small curvature portion of the plane of incidence and exit facet, the emergent ray of light-emitting device can be made to command troops to the Daqu of exit facet, thus making the hot spot correspondingly biased forwards being formed in shadow surface, the region of light-emitting device projection is departed from immediately below this device.This need changes the light projector mode that the lamp holder elevation angle can realize Ray obliquity, and light source can not expose, and avoids human eye directly to contact with light, effectively can prevent dazzle.Also can realize making the uniform effect of the light distribution of hot spot simultaneously.
Further, described LED light source is arranged on position corresponding to small curve portion near the plane of incidence, makes LED light source be less than to the distance in the plane of incidence small curve portion distance that LED light source commands troops to plane of incidence Daqu.After said structure is optimized, most of light that LED light source sends enters lens from plane of incidence small curve portion, then commands troops to penetrate from the Daqu of exit facet, thus makes the light projector of the light-emitting device of LED desk lamp obtain better inclination angle.
Further, described light-emitting device commands troops to tilt upward to Daqu from the small curve portion of exit facet, makes the light projector direction of the light-emitting device of LED desk lamp to reach, makes the reading area of irradiation area closer to user of light-emitting device.
Preferably, the angle of inclination of described light-emitting device is less than or equal to 15 degree, on the basis making the irradiation area of light-emitting device closer to the reading area of user as far as possible, avoids LED light source angle of inclination excessive, causes dazzle.
Further, also comprise shading piece, described shading piece is located at the outside of described lens.Described shading piece can make the light-emitting device projecting direction of LED desk lamp more concentrated, the hot spot that the light-emitting device of LED desk lamp is formed has obvious boundary line, and be evenly distributed, also can prevent light from investing the region close with human eye simultaneously, thus improve anti-dazzle effect further.
Further, described shading piece comprises front apron, and is symmetricly set in the side shield of described front apron both sides; The outside of the front end that the Daqu that described front apron is arranged at the exit facet of described lens is commanded troops; Described side shield is arranged at the both sides of described lens.Distance between two side shields increases to the rear end in its small curve portion gradually from the front end that the Daqu of the exit facet of lens is commanded troops.Described shading piece adopts coordinating of above-mentioned set-up mode and lens, the light-emitting device of LED desk lamp is made to form a rectangular light spot on horizontal projection surface, with our common reading matter, as suitable in shapes such as newspaper, magazine, books, simultaneously and conventional desk, desk shape suitable.
Further, the curvature in a lateral direction in the middle part of described exit facet is less than the curvature in a lateral direction in the middle part of the plane of incidence.LED light source is made to emit beam after lens reflection, larger from the refraction angle of lens both sides emergent ray, thus increase the projected area of light-emitting device transverse direction.
Further, the curvature in a lateral direction of described exit facet both sides is greater than the curvature in a lateral direction of plane of incidence both sides, adopt this kind of design, LED light source is made to emit beam after lens reflection, invest middle part and the both sides of projected area equably, make the light-emitting device of LED desk lamp project the hot spot brightness formed more even.
Further, the described plane of incidence is laid with erosion line, and the light spot illumination that the light-emitting device of LED desk lamp is projected is more evenly distributed.
Accompanying drawing explanation
Fig. 1 is the light-emitting device stereogram of LED desk lamp;
Fig. 2 is the light-emitting device sectional view of LED desk lamp;
Fig. 3 is the light-emitting device application state figure of LED desk lamp;
Fig. 4 is a-quadrant enlarged drawing in Fig. 3.
Fig. 5 is lens upward view;
Fig. 6 is the profiles of lens along C place in Fig. 5.
Detailed description of the invention
" Daqu command troops front end " of the present invention and " rear end, small curve portion ", refer to from the visual angle of Fig. 2 and observe, and the left end of exit facet is " Daqu command troops front end ", and the right-hand member of exit facet is " rear end, small curve portion "." longitudinal direction " of the present invention refers to from the visual angle of Fig. 2 and observes, and the left end of exit facet is longitudinally to the direction of exit facet right-hand member; " horizontal direction " of the present invention refers to from the visual angle of Fig. 5 and observes, and the left end of lens is laterally to the direction of lens right-hand member; The above noun of locality and term, just in order to describe technical scheme of the present invention more easily, do not form any restriction to technical scheme of the present invention.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
See Fig. 1 to Fig. 3, the light-emitting device of a kind of LED desk lamp provided by the invention, comprises installation panel 1, LED light source 2 and lens 3; LED light source 2 and lens 3 are installed on installation panel 1, are provided with the lens cavity 301 of a side opening in the middle part of described lens 3, the coated described LED light source 2 of described lens cavity 301; Be the plane of incidence 201 of LED light source 2 inside described lens cavity 301, the outer surface that described lens 3 are relative with its opening is the exit facet 202 of LED light source 2; Described exit facet 202 and the plane of incidence 201 all have Daqu along the longitudinal direction and command troops and small curve portion, the Daqu of described exit facet 202 is commanded troops corresponding with the position in the small curve portion of the plane of incidence 201, and the small curve portion of described exit facet 202 is corresponding with the position that the Daqu of the plane of incidence 201 is commanded troops.
Compared with prior art, the setting that lens of the present invention are staggered by the plane of incidence 201 and the large and small curvature portion of exit facet 202, the emergent ray of light-emitting device can be made to command troops to the Daqu of exit facet 202, thus make the hot spot correspondingly biased forwards being formed in shadow surface.The region that light-emitting device is projected is departed from immediately below this device, and this need changes the light projector mode that the lamp holder elevation angle can realize Ray obliquity, and light source can not expose, and avoids human eye directly to contact with light, effectively can prevent dazzle.
See Fig. 2 to Fig. 4, described LED light source 2 is arranged on position corresponding to small curve portion near the plane of incidence 201, is less than the distance that LED light source 2 commands troops to the Daqu of the plane of incidence 201 to make LED light source 2 to the distance in the plane of incidence 201 small curve portion.After said structure is optimized, most of light that LED light source 2 sends enters lens 3 from the small curve portion of the plane of incidence 201, then commands troops to penetrate from the Daqu of exit facet 202, thus makes the light projector of the light-emitting device of LED desk lamp obtain better inclination angle.
As a kind of improvement project, described light-emitting device commands troops to tilt upward to Daqu from exit facet 202 small curve portion, makes the light projector direction of the light-emitting device of LED desk lamp to reach, makes the reading area of irradiation area closer to user of light-emitting device.The angle of inclination of described light-emitting device is less than or equal to 15 degree, the basis making the irradiation area of light-emitting device closer to the reading area of user is as far as possible avoided LED light source angle of inclination excessive, causes dazzle.
See Fig. 1 to 3, also comprise shading piece 4, described shading piece 4 is located at the outside of described lens 3.Described shading piece 4 can make the light-emitting device projecting direction of LED desk lamp more concentrated, and the hot spot that the light-emitting device of LED desk lamp is formed has obvious boundary line, and is evenly distributed, and also can prevent light from investing human eye simultaneously, thus improve anti-dazzle effect further.Described shading piece 4 comprises front apron 401, and is symmetricly set in the side shield 402 of described front apron 401 both sides; The outside of the front end that the Daqu that described front apron 401 is arranged at the exit facet 202 of described lens 3 is commanded troops; Described side shield 402 is arranged at the both sides of described lens 3.Distance between two side shields 402 increases to the rear end in its small curve portion gradually from the front end that the Daqu of the exit facet 202 of lens 3 is commanded troops.Described shading piece 4 adopts coordinating of above-mentioned set-up mode and lens 3, the light-emitting device of LED desk lamp is made to form a rectangular light spot on horizontal projection surface, with our common reading matter, as suitable in shapes such as newspaper, magazine, books, simultaneously and conventional desk, desk shape suitable.
See Fig. 5 and Fig. 6, the curvature in a lateral direction in the middle part of described exit facet 202 is less than the curvature in a lateral direction in the middle part of the plane of incidence 201.LED light source is made to emit beam after lens 3 reflect, larger from the refraction angle of lens 3 both sides emergent ray, thus increase the projected area of light-emitting device transverse direction.The curvature in a lateral direction of described exit facet 202 both sides is greater than the curvature in a lateral direction of the plane of incidence 201 both sides, adopt this kind of design, LED light source is made to emit beam after lens 3 reflect, invest middle part and the both sides of projected area equably, make the light-emitting device of LED desk lamp project the hot spot brightness formed more even.
Preferably, the described plane of incidence 201 is laid with erosion line, the hot spot that the light-emitting device of LED desk lamp is projected evenly.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also change above-mentioned embodiment and revise.Therefore, the present invention is not limited to detailed description of the invention disclosed and described above, also should fall in the protection domain of claim of the present invention modifications and changes more of the present invention.In addition, although employ some specific terms in this description, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (9)
1. a light-emitting device for LED desk lamp, comprises installation panel, LED light source and lens; LED light source and lens are installed on installation panel, are provided with the lens cavity of a side opening in the middle part of described lens, the coated described LED light source of described lens cavity; Be the plane of incidence of LED light source inside described lens cavity, the outer surface that described lens are relative with its opening is the exit facet of LED light source; It is characterized in that: described exit facet and the plane of incidence all have Daqu along the longitudinal direction and command troops and small curve portion, the Daqu of described exit facet is commanded troops corresponding with the position in the small curve portion of the plane of incidence, and the small curve portion of described exit facet is corresponding with the position that the Daqu of the plane of incidence is commanded troops.
2. the light-emitting device of a kind of LED desk lamp according to claim 1, it is characterized in that: described LED light source is arranged on the position in small curve portion near the plane of incidence, LED light source is less than to the distance in the plane of incidence small curve portion distance that LED light source commands troops to plane of incidence Daqu.
3. the light-emitting device of a kind of LED desk lamp according to claim 1, is characterized in that: described light-emitting device commands troops to tilt upward to Daqu from the small curve portion of exit facet.
4. the light-emitting device of a kind of LED desk lamp according to claim 3, is characterized in that: the angle of inclination of described light-emitting device is less than or equal to 15 degree.
5. the light-emitting device of a kind of LED desk lamp according to claim 1, is characterized in that: also comprise shading piece, and described shading piece is located at the outside of described lens.
6. the light-emitting device of a kind of LED desk lamp according to claim 5, is characterized in that: described shading piece comprises front apron, and is symmetricly set in the side shield of described front apron both sides; The outside of the front end that the Daqu that described front apron is arranged at the exit facet of described lens is commanded troops; Described side shield is arranged at the both sides of described lens.Distance between two side shields increases to the rear end in its small curve portion gradually from the front end that the Daqu of the exit facet of lens is commanded troops.
7. the light-emitting device of a kind of LED desk lamp according to claim 1, is characterized in that: the curvature in a lateral direction in the middle part of described exit facet is less than the curvature in a lateral direction in the middle part of the plane of incidence.
8. the light-emitting device of a kind of LED desk lamp according to claim 7, is characterized in that: the curvature in a lateral direction of described exit facet both sides is greater than the curvature in a lateral direction of plane of incidence both sides.
9. the light-emitting device of a kind of LED desk lamp according to claim 1, is characterized in that: the described plane of incidence is laid with erosion line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510313662.9A CN104930460B (en) | 2015-06-08 | 2015-06-08 | A kind of light-emitting device of LED desk lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510313662.9A CN104930460B (en) | 2015-06-08 | 2015-06-08 | A kind of light-emitting device of LED desk lamp |
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| Publication Number | Publication Date |
|---|---|
| CN104930460A true CN104930460A (en) | 2015-09-23 |
| CN104930460B CN104930460B (en) | 2018-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510313662.9A Active CN104930460B (en) | 2015-06-08 | 2015-06-08 | A kind of light-emitting device of LED desk lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110207048A (en) * | 2019-05-09 | 2019-09-06 | 深圳市邦贝尔电子有限公司 | A kind of dedicated glare prevention LED High-Pole Lamp tool in airport |
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| CN203273494U (en) * | 2013-06-07 | 2013-11-06 | 陈琦 | Table lamp with multiple illuminating modes |
| CN104654088A (en) * | 2013-11-16 | 2015-05-27 | 李绍勤 | Local light blocking table lamp |
| CN204665159U (en) * | 2015-06-08 | 2015-09-23 | 佛山冠今光电科技有限公司 | A kind of light-emitting device of LED desk lamp |
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2015
- 2015-06-08 CN CN201510313662.9A patent/CN104930460B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110013394A1 (en) * | 2008-04-03 | 2011-01-20 | Koninklijke Philips Electronics N.V. | Luminaire for illuminating a space underneath a ceiling or a canopy, and method of illuminating such a space |
| CN202253363U (en) * | 2011-07-12 | 2012-05-30 | 东莞巨扬电器有限公司 | Advertising lamp lens |
| CN203273494U (en) * | 2013-06-07 | 2013-11-06 | 陈琦 | Table lamp with multiple illuminating modes |
| CN103335276A (en) * | 2013-07-26 | 2013-10-02 | 苏州东山精密制造股份有限公司 | LED (light emitting diode) streetlamp lens and LED streetlamp system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110207048A (en) * | 2019-05-09 | 2019-09-06 | 深圳市邦贝尔电子有限公司 | A kind of dedicated glare prevention LED High-Pole Lamp tool in airport |
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| Publication number | Publication date |
|---|---|
| CN104930460B (en) | 2018-09-07 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A light emitting device of LED desk lamp Effective date of registration: 20201214 Granted publication date: 20180907 Pledgee: Shunde Guangdong rural commercial bank Limited by Share Ltd. Daliang branch Pledgor: FOSHAN TOPDAY OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Registration number: Y2020980009231 |
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Date of cancellation: 20211217 Granted publication date: 20180907 Pledgee: Shunde Guangdong rural commercial bank Limited by Share Ltd. Daliang branch Pledgor: FOSHAN TOPDAY OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Registration number: Y2020980009231 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Light emitting device of LED table lamp Effective date of registration: 20211220 Granted publication date: 20180907 Pledgee: Guangdong Shunde Rural Commercial Bank Co.,Ltd. science and technology innovation sub branch Pledgor: FOSHAN TOPDAY OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Registration number: Y2021980015722 |
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