CN103867935A

CN103867935A - Light emitting diode lamp

Info

Publication number: CN103867935A
Application number: CN201210547360.4A
Authority: CN
Inventors: 杨闵舜; 蔡明达; 林浩翔
Original assignee: Rongchuang Energy Technology Co ltd; Zhanjing Technology Shenzhen Co Ltd
Current assignee: Rongchuang Energy Technology Co ltd; Zhanjing Technology Shenzhen Co Ltd
Priority date: 2012-12-17
Filing date: 2012-12-17
Publication date: 2014-06-18
Also published as: TW201430282A

Abstract

The invention discloses a light emitting diode lamp. The light emitting diode lamp comprises a light transmission lamp shade, a lamp housing, a circuit board held in the lamp housing and a light source module mounted on the circuit board, an opening is formed in the lower end of the lamp shade, the lamp housing is connected with the opening of the lamp shade, the lamp shade comprises an upper half part far away from the opening and a lower half part located between the upper half part and the opening, the upper half part is an arc surface with a first radius, the lower half part is an arc surface with a second radius, and the diameter of the opening is more than or equal to the first radius and is less than two times of the first radius.

Description

LED lamp

Technical field

The present invention relates to a kind of lighting device, particularly a kind of LED lamp.

Background technology

Light emitting diode (Light emitting diode, LED) can send the light of certain brightness, its brightness can regulate by curtage again, itself is shock-resistant, anti-vibration again, and glow color is very abundant, color transition is very soft, and service life is longer 20 to 30 times than ordinary incandescent lamp simultaneously.Based on above various advantages, also adopt and praised highly by industry to the LED lamp of the similar profile of incandescent lamp using light emitting diode as light source.

Existing LED lamp generally includes transparent lamp shade, is covered in inner LED source and lamp housing by lampshade, and lampshade is generally hemispherical, and its lower ending opening is connected with lamp housing.LED source is generally positioned at the bottom of the opening of hemispherical lampshade, and this LED source is towards lampshade top light emitting.But, because the rising angle of LED source is limited, be generally 120 °, and the lampshade that covers in LED source outside is hemispherical, therefore, all light that LED source sends all through after lampshade refraction still towards the direction outgoing that deviates from opening, and can not be refracted to the sidepiece deflection to this LED lamp by this hemispheric lampshade, thereby can not increase the optical range that of this LED lamp.

Summary of the invention

In view of this, be necessary to provide a kind of go out the larger LED lamp of optical range.

A kind of LED lamp, comprise transparent lamp shade, lamp housing, be housed in the circuit board in lamp housing and be installed in the light source module on circuit board, described lampshade lower end is provided with opening, described lamp housing is connected in the opening part of described lampshade, described lampshade comprises away from the first half of described opening and the Lower Half between this first half and opening, the described first half is the arc surface with the first radius, described Lower Half is the arc surface with the second radius, and the diameter of described opening is more than or equal to the first radius and is less than two times of the first radius.

LED lamp provided by the invention, the light that light source module sends is by the first half of ectocentral part directive lampshade, near the Lower Half of peripheral part directive lampshade.The light of the directive first half is through the refraction of the spherical first half, towards both sides, the axis deflection of this lampshade, the light of directive Lower Half is through the refraction of Lower Half, further towards the deflection of the both sides of LED lamp, thereby expand the rising angle of light, increased the range of exposures of LED lamp.

With reference to the accompanying drawings, the invention will be further described in conjunction with specific embodiments.

Accompanying drawing explanation

Fig. 1 is the schematic side view of the LED lamp of first embodiment of the invention.

Fig. 2 is the schematic side view of the LED lamp of second embodiment of the invention.

Fig. 3 is the lighting angle of LED lamp and the curve comparison figure of luminous flux of first, second embodiment.

Main element symbol description

LED lamp	100、200
		Lampshade	10、50
The first half	11、51
		Lower Half	12、52
Opening	13、53
		Lamp housing	20
Light source module	30
		LED source	31
Connector	40
		External screw thread	401
The first chamfering	54
		The second chamfering	55

The following specific embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.

The specific embodiment

Refer to Fig. 1, a kind of LED lamp 100 that first embodiment of the invention provides comprises lampshade 10, lamp housing 20, is installed in the light source module 30 on lamp housing 20, and connects the connector 40 of lamp housing 20.

Described lampshade 10 is a light transmission lampshade, and it is roughly spherical, and it comprises the first half 11, Lower Half 12 and an opening 13.This first half 11 is positioned at the upper end of lampshade 10, and opening 13 is relative with the first half 11 and be positioned at the lower end of lampshade 10, and Lower Half 12 is between the first half 11 and opening 13.This first half 11 is arc surface, and the radius of curvature of the circular arc of this first half 11 is the first radius R 1.In the present embodiment, the part that this first half 11 is spheroid, and be further the half of a spheroid, that is, and hemisphere, the value of this first radius R 1 is 30 millimeters (mm).This Lower Half 12 is arc surface, further, and its part that is spheroid.The radius of curvature of the circular arc of this Lower Half 12 is the second radius R 2, and the value of this second radius R 2 is between 25 to 40 millimeters.The junction of this first half 11 and Lower Half 12 is positioned on the horizontal plane at centre of sphere place of this first half 11.In the present embodiment, this second radius R 2 equates with the value of the first radius R 1, is 30 millimeters.The centre of sphere of this first half 11 and Lower Half 12 is overlapping, forms same spheroid.This opening 13 is positioned at the lower end of Lower Half 12 rounded, and the diameter of this opening 13 is more than or equal to the first radius R 1 of the first half 11, and is less than two times of this first radius R 1.The height of this lampshade 10, that is, the distance from the plane at opening 13 places to the top of the first half 11, is less than the first radius R 1 and the second radius R 2 sums.In the present embodiment, the diameter of opening 13 is 39.4 millimeters, and the height of this lampshade 10 is 51 millimeters.

Described lamp housing 20 is installed in the below of lampshade 10, and docks with the opening 13 of lampshade 10.Described light source module 30 is installed in lamp housing 20, and is covered in inside by lampshade 10.Described light source module 30 comprises a LED source 31 and circuit board 32, and this LED source 31 is positioned at opening 13 places of lampshade 10, and luminous towards the direction of lampshade 10.

Described connector 40 is connected in the lower end of lamp housing 20, and these connector 40 entirety are cylindric, for be electrically connected to provide the LED lamp 100 required electric energy of working with external power source.The outer wall of this connector 40 forms external screw thread 401, and this external screw thread 401 is for being connected and fixed with external power receptacle (not shown).In the present embodiment, this connector 40 is standard E39 lamp holder, and in other embodiments, this connector 40 can also be the universal socket of outer wall with outstanding buckle.

The light directive lampshade 10 that this LED source 31 sends, this light is by the first half 11 of ectocentral part directive lampshade 10, and this light is near the Lower Half 12 of peripheral part directive lampshade 10.The light A of the directive first half 11 is through the refraction of the spherical first half 11, and towards both sides, the axis deflection of this lampshade 10, and this part light is final still towards the outside that shines lampshade 10 away from the direction of lamp housing 20.The light B of directive Lower Half 12 is through the refraction of spherical Lower Half 12, further towards the deflection of the both sides of LED lamp 100.The light B directive of directive Lower Half 12 a bit after towards the opposite side deflection away from this incident ray B of the normal direction of this point, because Lower Half 12 is to be inside contracted to the direction of opening 13 by the bottom of the first half 11, and be a part for spheroid, there is fixing radius of curvature, therefore, the light of directive Lower Half 12 is the closer to the outside of LED lamp 100, the easier direction deflection towards the outside near LED lamp 100, thus, the part light that LED source 31 sends is because the refraction of the Lower Half 12 of process lampshade 10, make more light towards the deflection of the both sides of LED lamp 100, thereby expand the rising angle of light, and then the range of exposures of increase LED lamp 100.

Refer to Fig. 2, a kind of LED lamp 200 that second embodiment of the invention provides comprises lampshade 50, lamp housing 20, is installed in the light source module 30 in lamp housing 20, and connects the connector 40 of lamp housing 20.

The difference of the LED lamp 100 that the LED lamp 200 of present embodiment provides from the first embodiment is: the shape of lampshade 50 is different.This lampshade 50 comprises the first half 51, Lower Half 52 and opening 53.This first half 51 is positioned at the upper end of lampshade 50, the lower end that opening 53 is relative with the first half 51, be positioned at lampshade 50, and Lower Half 52 is between the first half 51 and opening 53.The part that this first half 51 is spheroid, the radius of curvature of this first half 51 is the first radius R 1, in the present embodiment, the value of this first radius R 1 is 30 millimeters (mm).This Lower Half 52 is arc surface, and its longitudinal cross-section, perpendicular to the cross section of circuit board 32, for circular-arc.The radius of curvature of this Lower Half 52 is the second radius R 2, and the center of circle of these Lower Half 52 place circles is positioned at the outside of lampshade 50.The junction of this first half 51 and Lower Half 52 is between the plane at these opening 53 places and the centre of sphere of the first half 11.That is to say, the shape of the first half 52 is greater than spheroid half.In the present embodiment, the value of the second radius R 2 is 38.66 millimeters.Further, between this Lower Half 52 and opening 53, being also formed with some chamferings, is the first chamfering 54 and the second chamfering 55.This first chamfering 54 and the second chamfering 55 are circular arc chamfering, the radian of this first chamfering 54 protrudes to the direction away from lampshade 51 centre ofs sphere, the radian of the second chamfering 55 is to the direction indent near lampshade 51 centre ofs sphere,, the center of circle of the first chamfering 54 is positioned at the inside of lampshade 50, and the center of circle of the second chamfering 55 is positioned at the outside of lampshade 50.This first chamfering 54 and the second chamfering 55 are for Lower Half 52 and the opening 53 of lampshade 50 in smoothing junction.

The LED lamp 200 of second embodiment of the invention, the light that light source module 30 sends is by the first half 51 of ectocentral part directive lampshade 50, near the Lower Half 52 of peripheral part directive lampshade 50.The light A1 of the directive first half 51 is through the refraction of the spherical first half 51, and towards both sides, the axis deflection of this lampshade 50, and this part light is final still towards the outside that shines lampshade 50 away from the direction of lamp housing 20.The light B2 of directive Lower Half 52 is through having the refraction of Lower Half 52 of negative value radius of curvature, further towards the deflection of the both sides of LED lamp 200, thereby expanded the rising angle of light, increases the range of exposures of LED lamp 200.

As shown in Figure 3, be the lighting angle of LED lamp 100,200 and the coordinate figure line comparison diagram of luminous flux of first embodiment of the invention and the second embodiment.Figure line 1 is the figure line of the LED lamp 100 of the first embodiment, approximately 50% luminous flux is several within the scope of the lighting angle that is greater than 190 °, be that lighting angle is the scope of-90 ° to 90 °, and still have 10% luminous flux within the scope of the lighting angle that is greater than 338 °.Figure line 2 is the figure line of the LED lamp 200 of the second embodiment, and approximately 50% luminous flux is several within the scope of the lighting angle that is greater than 162 °, and still has 10% luminous flux within the scope of the lighting angle that is greater than 308 °.This shows, through the refraction of

lampshade

20,50, greatly increased the rising angle of LED lamp 100,200, thereby expanded illumination zone.

Technology contents of the present invention and technical characterstic disclose as above, but those skilled in the art still may be based on teaching of the present invention and announcements and made all replacement and modifications that does not deviate from spirit of the present invention.Therefore, protection scope of the present invention should be not limited to the content that embodiment discloses, and should comprise various do not deviate from replacement of the present invention and modifications, and is contained by appended claim.

Claims

1. a LED lamp, comprise transparent lamp shade, lamp housing, be housed in the circuit board in lamp housing and be installed in the light source module on circuit board, described lampshade lower end is provided with opening, described lamp housing is connected in the opening part of described lampshade, it is characterized in that: described lampshade comprises away from the first half of described opening and the Lower Half between this first half and opening, the described first half is the arc surface with the first radius, described Lower Half is the arc surface with the second radius, and the diameter of described opening is more than or equal to the first radius and is less than two times of the first radius.

2. LED lamp as claimed in claim 1, is characterized in that: the diameter of described opening is more than or equal to 30 millimeters, is less than or equal to 45 millimeters.

3. LED lamp as claimed in claim 1, is characterized in that: described the first radius is 30 millimeters.

4. LED lamp as claimed in claim 3, is characterized in that: described the second radius is between 25 millimeters to 40 millimeters.

5. LED lamp as claimed in claim 4, is characterized in that: described the second radius is 30 millimeters, and the centre of sphere of the described first half and the centre of sphere of Lower Half are overlapping.

6. LED lamp as claimed in claim 4, is characterized in that: the plane at the first half of described lampshade and place, Lower Half junction is positioned at the centre of sphere top of this first half.

7. LED lamp as claimed in claim 3, is characterized in that: the center of circle of described Lower Half place circle is positioned at the outside of lampshade.

8. LED lamp as claimed in claim 7, is characterized in that: the plane at the first half of described lampshade and place, Lower Half junction is between the plane at opening place and the centre of sphere of the first half of this lampshade.

9. LED lamp as claimed in claim 7, is characterized in that: between described Lower Half and opening, comprise successively the first chamfering and the second chamfering, the center of circle of this first chamfering is positioned at the inside of lampshade, and the center of circle of this second chamfering is positioned at the outside of lampshade.

10. the LED lamp as described in any one in claim 1-9, is characterized in that: the height of described lampshade is greater than the first radius, and is less than two times of the first radius.