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Դ/news/228.html   ʱ䣺2018-10-08

ΪʲôҪעظɢ
Why should we pay attention to the heat dissipation problem of high Ji'nan luminous characters?
ƾȫԵĶȱٺͻȾϷܼŹÿռ䣬ڼϷֵ˵Ŀ⡣һ˵ϷҵǷȣûɢҪгϵĸLEDƵɢȣѡȻɢȣòϷɢҲһҪIJ֣費ܺܺɢ.ҲӰ졣
With the lack of global power and environmental pollution, Jinan Luminous Characters has a wide range of applications for its energy-saving and environmental protection characteristics. The use of Luminous Characters in Jinan is attracting the attention of the world. Generally speaking, Jinan light-emitting word operation is stable, quality, and the heat dissipation of the lamp body itself is very important, now the market of high-brightness LED lamp heat dissipation, often choose natural heat dissipation, the role is not ambitious. Jinan luminous word heat dissipation is also an important part, assuming that not very good heat dissipation. Its life will also be affected.
1.ǼϷеҪ
1. heat treatment is the most important problem in the use of luminous characters in Ji'nan.
III嵪pͲMgܽȺͿѨĽϸܣرpзбҪͨṹȳʧ Ϸֵɢ;Ҫȴȶ

Because the p-type doping of group III nitrides is limited by the solubility of Mg acceptors and the high starting energy of cavities, the heat is very simple in the p-type region, and it is necessary for the heat to be lost on the heat sink through the whole structure; the heat transfer and heat convection are the main ways to dissipate the Jinan luminous characters.

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2.ԼϷֵӰ
2. the influence of heat on Ji'nan's luminous characters.
ڱ׼СľƬڣƬ¶ߣӦķǾȷց.Ƭ⹦ʺөۼ书½¶Խضֵʱʧʳָӡ
When the temperature of the wafer rises, the thermal stress is non-uniformly distributed. The luminous power of the wafer and the fluorescent powder lasing power decrease. When the temperature exceeds a certain value, the device power loss increases exponentially.
ͳƲϱԪ¶ÿ2棬ɿ½10%Ϸֲڷɰ׹ϵͳʱĺɢϾѳΪLEDõȾ
The statistical material indicates that the reliability of the component decreases by 10% when the temperature rises 2 degrees. When more than one Ji'nan glowing word is covered with a white light system, the problem of heat dissipation is even more serious. The issue of heat treatment has become a prerequisite for the use of high brightness LED.
3.Ƭ׼ɢȵ
3. contact between chip standard and heat dissipation
߼Ϸֱֵӵķ빦ʣΪ˱ԴķбҪӦp-nı׼빦ʱضʹߣʹӹ½ܹʵǰȡp-nᵼIJ.ڼоƬ.ṹ.װu.ƬϵܶȲ估ƽȵɢ£ӾƬı׼ ¶Ƚ
The most direct way to improve the brightness of Jinan luminous word is to increase the input power, and in order to avoid the fullness of active layer, it is necessary to increase the standard of p-n junction accordingly; increasing the input power will certainly increase the junction temperature, and then reduce the quantum power. The advancement of single-transistor power depends on the ability of the device to derive heat from the p-n junction. The junction temperature will continue to rise if the wafer standard is increased independently, with the existing wafer material, structure, packaging process, constant current density on the wafer and equal heat dissipation.
ɽ쳿洫ý޹˾,ϵȤѿԹעվྫݻӭѯлл
Shandong Hongchen Advertising Media Co., Ltd., interested in Jinan Lightbox friends can pay attention to our website , more exciting content welcome to inquire, thank you!

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