CN202546346U - LED (Light Emitting Diode) lamp tube capable of emitting light uniformly - Google Patents
LED (Light Emitting Diode) lamp tube capable of emitting light uniformly Download PDFInfo
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- CN202546346U CN202546346U CN2012200867395U CN201220086739U CN202546346U CN 202546346 U CN202546346 U CN 202546346U CN 2012200867395 U CN2012200867395 U CN 2012200867395U CN 201220086739 U CN201220086739 U CN 201220086739U CN 202546346 U CN202546346 U CN 202546346U
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- fluorescent tube
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- emitting diode
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Abstract
The utility model relates to an LED (Light Emitting Diode) lamp tube capable of emitting light uniformly. The LED lamp tube provided by the utility model comprises a lamp tube main body and a lamp base which is connected to two end of the lamp tube main body; a power supply is arranged between the lamp tube main body and the lamp base; the lamp tube main body comprises a light diffusion transparent cover and a heat dissipation shell which define a lamp cavity together; the heat dissipation shell is provided with a base plate; the base plate is provided with LEDs; and the maximum distance between the LEDs and the light diffusion transparent cover is greater than 50% of the total height of the lamp tube main body. The LED lamp tube has the beneficial effects that the power supply is arranged outside the heat dissipation shell and is not arranged in the heat dissipation shell any more, therefore, a big accommodation space for installing the power supply does not need to be reserved in the heat dissipation shell, the height of the base plate is reduced, the distance between the LEDs and the light diffusion transparent cover is improved, the lighting overlapping range between the adjacent LEDs is increased, and further the lighting uniformity of the LED lamp tube is improved.
Description
Technical field
The present invention relates to lighting device, relate in particular to a kind of luminous uniform LED fluorescent tube in the lighting device.
Background technology
LED (LED is the abbreviation of Light Emitting Diode, and Chinese is translated into light emitting diode) fluorescent tube also is commonly called as light pipe, fluorescent tube, and its light source adopts LED as illuminator.Traditional fluorescent tube is claimed fluorescent lamp again, and respectively there is a filament at the lamp two ends, is filled with argon and the thin mercury vapour of trace in the fluorescent tube, scribbles fluorescent material on the tube inner wall, sends ultraviolet ray during gaseous conduction between two filaments, makes fluorescent material send visible light.Owing to contain heavy metal pollution material " mercury ", make that the fluorescent tube of scrapping is very serious to the pollution of environment.And the LED light pipe adopts light emitting diode as light source, and light efficiency is higher, more energy-conservation, longer service life, and more environmental protection, becomes the ideal product that the current stage replaces fluorescent tube.
As shown in Figure 1, existing LED fluorescent tube comprises light diffusion diffuser 1, substrate 3, light emitting diode 4 and heat radiation shell 2, wherein; Substrate 3 is generally aluminium base (or glass fabric substrate etc.); 2 on heat radiation shell is aluminium heat radiation shell, and aluminium base is installed in the top of aluminium heat radiation shell, and light emitting diode 4 then is installed in the top of aluminium base; The light that light emitting diode 4 is sent is through light diffusion diffuser 1 and transmission is gone out; Realize illumination, and aluminium heat radiation shell is provided with one and holds and place cavity 21, is used to install power supply and wears power lead.
Light as shown in Figure 2, that on behalf of light emitting diode 4, the dotted line of band arrow penetrate among Fig. 2, H1, H2, H3 be respectively substrate 3 when being in differing heights light emitting diode 4 and light spread the maximum spacing of diffuser 1; Wherein, H3>H2>H1, can find out through Fig. 2; Place the problem that cavity 21 has solved power supply installation and threading though this holds, can improve the top height of aluminium heat radiation shell, thereby raised the height of aluminium base; Cause light emitting diode 4 and light to spread the hypotelorism of diffuser 1; The overlapping scope of illumination between the adjacent light emitting diode 4 will reduce, and make that the uneven illumination of LED fluorescent tube is even, even the defective of dark class can occur.
As shown in Figure 3, the dotted line of band arrow is represented the light that light emitting diode 4 penetrates among Fig. 3, at present; In order to overcome the defective that causes the overlapping scope minimizing of illumination between the adjacent light emitting diode 4 owing to the hypotelorism of light emitting diode 4 and light diffusion diffuser 1; The uneven illumination that is the LED fluorescent tube is even, even the defective of dark class can occur, mainly is to adopt the quantity that increases light emitting diode 4; Through dwindling the spacing of adjacent light emitting diode 4; The overlapping scope of photograph between the adjacent light emitting diode 4 of recovering damage, the spacing of promptly dwindling adjacent light emitting diode 4 improves the overlapping scope of illumination between the adjacent light emitting diode 4; Thereby the uneven illumination that overcomes the LED fluorescent tube is even; Even dark class defective can occur, but, just mean that also the material of LED fluorescent tube and manufacturing cost will increase owing to increased the quantity of light emitting diode 4.
In addition; Another kind of scheme is also arranged, and mainly is the light diffusion diffuser 1 that spreads diffuser 1 or surperficial frosted through the light that adopts low-transmittance, so; Then can reduce the light efficiency and the luminous flux of LED fluorescent tube, can cause power consumption to increase in order to reach same output light flux.
Summary of the invention
In order to solve the problems of the prior art, the invention provides a kind of luminous uniform LED fluorescent tube.
The invention provides a kind of luminous uniform LED fluorescent tube; Comprise the lamp holder that the fluorescent tube main body is connected with two ends with said fluorescent tube main body; Be provided with power supply between said fluorescent tube main body and the said lamp holder, said fluorescent tube main body comprises that the phase obvolvent forms light diffusion diffuser, the heat radiation shell in lamp chamber, and said heat radiation shell is provided with substrate; Said substrate is provided with light emitting diode, and the maximum spacing of said light emitting diode and said light diffusion diffuser is greater than 50% of the total height of said fluorescent tube main body.
As further improvement of the present invention, said light diffusion diffuser, the obvolvent of heat radiation shell be circular, and the maximum spacing that said light emitting diode and said light spread diffuser is greater than 50% of the diameter of said fluorescent tube main body.
As further improvement of the present invention, said light diffusion diffuser, the obvolvent of heat radiation shell be circular, and the maximum spacing that said light emitting diode and said light spread diffuser is greater than 60% of the diameter of said fluorescent tube main body.
As further improvement of the present invention, said light diffusion diffuser, the obvolvent of heat radiation shell be circular, and the maximum spacing that said light emitting diode and said light spread diffuser is greater than 70% of the diameter of said fluorescent tube main body.
As further improvement of the present invention, said light diffusion diffuser, the obvolvent of heat radiation shell be circular, and the maximum spacing that said light emitting diode and said light spread diffuser is greater than 75% of the diameter of said fluorescent tube main body.
As further improvement of the present invention; Said heat radiation shell comprises arcuation outside plate and substrate installing plate; Said substrate installing plate is the string of said arcuation outside plate, and said substrate is arranged on the said substrate installing plate, the threading cavity for supplying lead to pass between said substrate and the said arcuation outside plate.
As further improvement of the present invention, the both sides of said light diffusion diffuser are provided with radially the export-oriented grab towards flanging, and the both sides of said heat radiation shell are provided with radially interior to grab towards in-flanges, and said export-oriented grab is with said interior to the grab clamping.
As further improvement of the present invention, said export-oriented grab comprises the inclined plane part that radially extends internally and radially towards the pothook of flanging.
As further improvement of the present invention, the light that said inclined plane part and said light emitting diode penetrate parallels.
As further improvement of the present invention; Be provided with the power supply mounting shell between the two ends of said fluorescent tube main body and the said lamp holder; Said power supply comprises the first split power supply and the second split power supply, and the said first split power supply and the second split power supply are installed in respectively in two said power supply mounting shells.
The invention has the beneficial effects as follows: through such scheme, no longer power supply is arranged in the heat radiation shell, but power supply is arranged on outside the heat radiation shell; Therefore; The heat radiation shell need not reserved the bigger placement cavity that holds power supply is installed, thereby has reduced the height of substrate, and then has improved the spacing of light emitting diode and light diffusion diffuser; Increase the overlapping scope of illumination between the adjacent light emitting diode, thereby improved the uniformity of LED fluorescent tube illumination.
Description of drawings
Fig. 1 is the cross section structure sketch map of LED fluorescent tube traditional in the prior art;
Fig. 2 be light emitting diode and light diffusion diffuser spacing and the overlapping scope of illumination between the adjacent light emitting diode concern sketch map;
Fig. 3 has increased after the quantity of light emitting diode, the overlapping scope of illumination between the spacing of light emitting diode and light diffusion diffuser and the adjacent light emitting diode concern sketch map;
Fig. 4 is the structural representation of a kind of luminous uniform LED fluorescent tube of the present invention;
Fig. 5 is the internal structure sketch map of luminous uniform LED fluorescent tube according to the invention;
Fig. 6 is the cross section structure sketch map of luminous uniform LED fluorescent tube according to the invention;
Fig. 7 is the height identification sketch map of the cross section structure of luminous uniform LED fluorescent tube according to the invention;
Fig. 8 is LED fluorescent tube traditional in the prior art structural representation when producing blanking bar of turning on light;
Fig. 9 is the luminous uniform LED fluorescent tube according to the invention structural representation when not producing blanking bar of turning on light;
Figure 10 is that luminous uniform LED fluorescent tube according to the invention is when turning on light, to the refraction sketch map that inclined plane part produced.
The specific embodiment
Below in conjunction with the description of drawings and the specific embodiment the present invention is further specified.
Drawing reference numeral among Fig. 4 to Figure 10 is: light diffusion diffuser 1; Export-oriented grab 11; Inclined plane part 111; Pothook 112; Heat radiation shell 2; Threading cavity 21; Interior to grab 22; Screw hole 23; Substrate installing plate 24; Arcuation outside plate 25; Substrate 3; Light emitting diode 4; Power supply 5; The first split power supply 51; The second split power supply 52; Lamp holder 6; Power supply mounting shell 7; Lamp chamber 8.
The dotted line of band arrow is represented the light that light emitting diode 4 penetrates among Fig. 4 to Figure 10.
To shown in Figure 6, a kind of luminous uniform LED fluorescent tube comprises the lamp holder 6 that the fluorescent tube main body is connected with two ends with said fluorescent tube main body like Fig. 4; Be provided with power supply 5 between said fluorescent tube main body and the said lamp holder 6; Said fluorescent tube main body comprises that the phase obvolvent forms light diffusion diffuser 1, the heat radiation shell 2 in lamp chamber 8, and said heat radiation shell 2 is provided with substrate 3, and said substrate 3 is provided with a plurality of light emitting diodes 4; Said light emitting diode 4 is positioned within the said lamp chamber 8; The maximum spacing of said light emitting diode 4 and said light diffusion diffuser 1 is greater than 50% of the total height of said fluorescent tube main body, and the maximum spacing of promptly said light emitting diode 4 and said light diffusion diffuser 1 is greater than 50% of the total cross section height of said fluorescent tube main body, promptly is said light emitting diode 4 and 50% of the total height of the maximum spacing of said light diffusion diffuser 1 after greater than said light diffusion diffuser 1,2 obvolvents of heat radiation shell; Wherein, Said heat radiation shell 2 is preferably aluminium heat radiation shell, and said substrate 3 is preferably aluminum cooling substrates, and said power supply 5 is driving power.
To shown in Figure 6, said light diffusion diffuser 1,2 obvolvents of heat radiation shell be circular like Fig. 4, and wherein a preferred version does, the maximum spacing that said light emitting diode 4 and said light spread diffuser 1 is greater than 40% of the diameter of said fluorescent tube main body.
To shown in Figure 6, said light diffusion diffuser 1,2 obvolvents of heat radiation shell be circular like Fig. 4, and wherein a preferred version does, the maximum spacing that said light emitting diode 4 and said light spread diffuser 1 is greater than 50% of the diameter of said fluorescent tube main body.
To shown in Figure 6, said light diffusion diffuser 1,2 obvolvents of heat radiation shell be circular like Fig. 4, and wherein a preferred version does, the maximum spacing that said light emitting diode 4 and said light spread diffuser 1 is greater than 60% of the diameter of said fluorescent tube main body.
To shown in Figure 6, said light diffusion diffuser 1,2 obvolvents of heat radiation shell be circular like Fig. 4, and wherein a preferred version does, the maximum spacing that said light emitting diode 4 and said light spread diffuser 1 is greater than 70% of the diameter of said fluorescent tube main body.
To shown in Figure 6, said light diffusion diffuser 1,2 obvolvents of heat radiation shell be circular like Fig. 4, and wherein a preferred version does, the maximum spacing that said light emitting diode 4 and said light spread diffuser 1 is greater than 75% of the diameter of said fluorescent tube main body.
To shown in Figure 6, said light diffusion diffuser 1,2 obvolvents of heat radiation shell be circular like Fig. 4, and wherein a preferred version does, the maximum spacing that said light emitting diode 4 and said light spread diffuser 1 is greater than 80% of the diameter of said fluorescent tube main body.
As shown in Figure 7, the diameter of said fluorescent tube main body is D, and said light emitting diode 4 is H with the maximum spacing of said light diffusion diffuser 1.
As shown in Figure 6, said heat radiation shell 2 comprises arcuation outside plate 25 and substrate installing plate 24, and said substrate installing plate 24 is the string of said arcuation outside plate 25; Said substrate 3 is arranged on the said substrate installing plate 24, the threading cavity 21 for supplying lead to pass between said substrate 3 and the said arcuation outside plate 25, wherein; Said arcuation outside plate 25 is a minor arc; Said substrate installing plate 24 then is the string on this minor arc, then is threading cavity 21 between minor arc and the string, and said 1 of diffuser of light diffusion is the major arc shape.
As shown in Figure 8; Light diffusion diffuser 1 in the prior art in the traditional LED fluorescent tube is an exterior buckle type with heat radiation shell 2; Be light diffusion diffuser 1 parcel heat radiation shell 2,, cause both fastening places can produce blanking bar 100 because the light of light emitting diode 4 receives stopping of heat radiation shell 2.
Like Fig. 6,9, shown in 10, the both sides of said light diffusion diffuser 1 are provided with radially the export-oriented grab 11 towards flanging, and the both sides of said heat radiation shell 2 are provided with radially interior to grab 22 towards in-flanges; Said export-oriented grab 11 is with said interior to grab 22 clampings; The distance in the center of circle of said export-oriented grab 11 and said fluorescent tube main body is less than said interior to the distance of grab 22 with the center of circle of said fluorescent tube main body, and so reverse clamping makes the shell 2 that dispels the heat wrap up light diffusion diffusers 1; Because the light of light emitting diode 4 can not receive stopping of heat radiation shell 2; But light direct light diffusion diffuser 1 has been avoided the generation of blanking bar, thereby improves the uniformity of luminance of LED fluorescent tube.
Shown in figure 10; Said export-oriented grab 11 comprises the inclined plane part 111 that radially extends internally and radially towards the pothook 112 of flanging, because always there is refraction to a certain degree in light diffusion diffuser 1, therefore; The light of bounce back also has the part refrangible to inclined plane part 111; Further strengthen the brightness of inclined plane part 111, can better avoid the generation of blanking bar, thereby improved the uniformity of luminance of LED fluorescent tube.
Like Fig. 6,9, shown in 10; Said inclined plane part 111 parallels with the light that said light emitting diode 4 penetrates; Can farthest improve the light of injecting inclined plane part 111; Further strengthen the brightness of inclined plane part 111, can better avoid the generation of blanking bar, thereby improved the uniformity of luminance of LED fluorescent tube.
Like Fig. 4, shown in 5; Be provided with power supply mounting shell 7 between the two ends of said fluorescent tube main body and the said lamp holder 6, said power supply 5 comprises the first split power supply 51 and the second split power supply 52, and the said first split power supply 51 and the second split power supply 52 are installed in respectively in two said power supply mounting shells 7; Being about to said power supply 5 is divided into two; Be divided into the two ends of fluorescent tube main body, wherein, the said first split power supply 51 can be EMI filtering and AC rectification circuit part; The said second split power supply 52 can be DC/DC conversion and control circuit part; 52 of the said first split power supply 51 and the second split power supplys pass said threading cavity 21 through lead and come conducting, and the circuit that is about to said power supply 5 is divided into two parts, and a part is EMI filtering and AC rectification circuit part; Another part is DC/DC conversion and control circuit part; Can effectively dwindle the volume of said power supply 5, also can make the volume of the said first split power supply 51 and the second split power supply 52 symmetrical, can control circuit be made a circuit board assemblies; Transformer and relevant output rectifier cell are formed another circuit board assemblies; The two even connects through mortise and tenon mode, also can connect through winding displacement or row's pin mode, and the electrolytic capacitor filter that increases power supply 5 outputs can promote power-efficient; The element of EMI filtering and AC rectification circuit part is less relatively; The element of DC/DC conversion and control circuit part is many, can in the power supply mounting shell 7 of the first split power supply 51, increase independent electrochemical capacitor, and this independent electrochemical capacitor can link to each other or link to each other through adding the electronics line through copper sheet cabling on the light source board.
Another embodiment of the present invention also can only adopt a power supply 5, only power supply 5 is arranged at a wherein end of fluorescent tube main body.
Adopt termination formula driving power design, power supply 5 be placed on fluorescent tube main body two ends, the driving power heating can be dispersed in the air through power supply mounting shell 7, with heat radiation shell 2 have only the end link to each other, little to the warming-up effect of the shell 2 that dispels the heat; Be built in the design ratio of heat radiation shell inner chamber with driving power in the traditional scheme; The heat of the light emitting diode 4 of this programme can distribute through heat radiation shell 2 uniformly, can not produce the heating of power supply and the heating of light emitting diode 4 and all will rely on 2 heat radiations of heat radiation shell; On-chip power is uneven in the two ends heating of the LED fluorescent tube of aluminium heat radiation shell inner chamber; Have the end heating of driving power to be higher than an end that does not have driving power, an end (power supply heating and LED lamp pearl heating baking each other) that can cause driving power is because the higher LED of the making lamp of temperature pearly-lustre declines faster than the other end.
A kind of luminous uniform LED fluorescent tube provided by the invention no longer is arranged on power supply 5 in the heat radiation shell 2, but power supply 5 is arranged on outside the heat radiation shell 2; Therefore; Heat radiation shell 2 need not reserved bigger cavity power supply 5 is installed, thereby has reduced the height of substrate 3, and then has improved the spacing of light emitting diode 4 with light diffusion diffuser 1; Increase the overlapping scope of illumination between the adjacent light emitting diode 4, thereby improved the uniformity of LED fluorescent tube illumination.
A kind of luminous uniform LED fluorescent tube provided by the invention; No hot spot, blanking bar, high light efficiency, cost is low; Energy-conservation; Adopting light diffusion diffuser 1, the reasonable structural design of minimum LED lamp pearl (being light emitting diode 4), high transmission rate, realize reaching the target light flux of even output, is a kind of high light efficiency, the luminous all even LED fluorescent tube that cost competitiveness is arranged.
A kind of luminous uniform LED fluorescent tube provided by the invention can be applicable to the LED fluorescent tube of circular section, also can be applicable to the LED fluorescent tube of odd-shaped cross section, is applicable to that T8, T10 or other cross section are case type LED fluorescent tube, is applicable to that the overall plastic pipe of no aluminium heat radiation shell designs.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (10)
1. luminous uniform LED fluorescent tube; It is characterized in that: comprise the lamp holder that the fluorescent tube main body is connected with two ends with said fluorescent tube main body; Be provided with power supply between said fluorescent tube main body and the said lamp holder, said fluorescent tube main body comprises that the phase obvolvent forms light diffusion diffuser, the heat radiation shell in lamp chamber, and said heat radiation shell is provided with substrate; Said substrate is provided with light emitting diode, and the maximum spacing of said light emitting diode and said light diffusion diffuser is greater than 50% of the total height of said fluorescent tube main body.
2. according to the said luminous uniform LED fluorescent tube of claim 1, it is characterized in that: said light diffusion diffuser, the obvolvent of heat radiation shell be for circular, and the maximum spacing that said light emitting diode and said light spread diffuser is greater than 50% of the diameter of said fluorescent tube main body.
3. according to the said luminous uniform LED fluorescent tube of claim 1, it is characterized in that: said light diffusion diffuser, the obvolvent of heat radiation shell be for circular, and the maximum spacing that said light emitting diode and said light spread diffuser is greater than 60% of the diameter of said fluorescent tube main body.
4. according to the said luminous uniform LED fluorescent tube of claim 1, it is characterized in that: said light diffusion diffuser, the obvolvent of heat radiation shell be for circular, and the maximum spacing that said light emitting diode and said light spread diffuser is greater than 70% of the diameter of said fluorescent tube main body.
5. according to the said luminous uniform LED fluorescent tube of claim 1, it is characterized in that: said light diffusion diffuser, the obvolvent of heat radiation shell be for circular, and the maximum spacing that said light emitting diode and said light spread diffuser is greater than 75% of the diameter of said fluorescent tube main body.
6. according to the said luminous uniform LED fluorescent tube of claim 1; It is characterized in that: said heat radiation shell comprises arcuation outside plate and substrate installing plate; Said substrate installing plate is the string of said arcuation outside plate; Said substrate is arranged on the said substrate installing plate, the threading cavity for supplying lead to pass between said substrate and the said arcuation outside plate.
7. according to the said luminous uniform LED fluorescent tube of claim 1; It is characterized in that: the both sides of said light diffusion diffuser are provided with radially the export-oriented grab towards flanging; The both sides of said heat radiation shell are provided with radially interior to grab towards in-flanges, said export-oriented grab and said in to the grab clamping.
8. according to the said luminous uniform LED fluorescent tube of claim 7, it is characterized in that: said export-oriented grab comprises the inclined plane part that radially extends internally and radially towards the pothook of flanging.
9. said according to Claim 8 luminous uniform LED fluorescent tube is characterized in that: the light that said inclined plane part and said light emitting diode penetrate parallels.
10. according to the said luminous uniform LED fluorescent tube of claim 1; It is characterized in that: be provided with the power supply mounting shell between the two ends of said fluorescent tube main body and the said lamp holder; Said power supply comprises the first split power supply and the second split power supply, and the said first split power supply and the second split power supply are installed in respectively in two said power supply mounting shells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200867395U CN202546346U (en) | 2012-03-09 | 2012-03-09 | LED (Light Emitting Diode) lamp tube capable of emitting light uniformly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200867395U CN202546346U (en) | 2012-03-09 | 2012-03-09 | LED (Light Emitting Diode) lamp tube capable of emitting light uniformly |
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| Publication Number | Publication Date |
|---|---|
| CN202546346U true CN202546346U (en) | 2012-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200867395U Withdrawn - After Issue CN202546346U (en) | 2012-03-09 | 2012-03-09 | LED (Light Emitting Diode) lamp tube capable of emitting light uniformly |
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|---|---|
| CN (1) | CN202546346U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620161A (en) * | 2012-03-09 | 2012-08-01 | 深圳嘉信高能源技术股份有限公司 | Light emitting diode (LED) lamp tube capable of uniformly emitting light |
| CN103196062A (en) * | 2013-04-22 | 2013-07-10 | 深圳市裕富照明有限公司 | Led lamp tube |
| CN103836402A (en) * | 2012-11-27 | 2014-06-04 | 东莞万士达液晶显示器有限公司 | Lighting bulb |
-
2012
- 2012-03-09 CN CN2012200867395U patent/CN202546346U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620161A (en) * | 2012-03-09 | 2012-08-01 | 深圳嘉信高能源技术股份有限公司 | Light emitting diode (LED) lamp tube capable of uniformly emitting light |
| CN102620161B (en) * | 2012-03-09 | 2013-04-03 | 深圳嘉信高能源技术股份有限公司 | Light emitting diode (LED) lamp tube capable of uniformly emitting light |
| WO2013131492A1 (en) * | 2012-03-09 | 2013-09-12 | 深圳嘉信高能源技术股份有限公司 | Led lamp emitting even light |
| CN103836402A (en) * | 2012-11-27 | 2014-06-04 | 东莞万士达液晶显示器有限公司 | Lighting bulb |
| CN103196062A (en) * | 2013-04-22 | 2013-07-10 | 深圳市裕富照明有限公司 | Led lamp tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121121 Effective date of abandoning: 20130403 |
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| RGAV | Abandon patent right to avoid regrant |