高光效側(cè)入式無導(dǎo)光板LED平板燈的研究
發(fā)布時間：2019-04-25 22:12
【摘要】：能源緊張問題已成為新時期人們關(guān)注的重點，在照明方面，節(jié)能和綠色環(huán)保的LED產(chǎn)品在室內(nèi)照明市場越來越活躍。然而現(xiàn)有的導(dǎo)光板側(cè)入式LED平板燈在帶給人們?nèi)岷凸庹�、高亮度大面積照明的同時,也存在著出光效率不高、造價成本過高等不足。本學(xué)位論文針對LED平板燈存在的問題，研究了一種側(cè)面背投式無導(dǎo)光板LED平板燈，對平板燈的結(jié)構(gòu)、背光源、散熱、出光面擴(kuò)散板及驅(qū)動電路進(jìn)行了優(yōu)化設(shè)計，以提高無導(dǎo)光板LED平板燈的整燈光效。 論文基于建筑設(shè)計的理念及人們?nèi)粘２晒饬?xí)慣，提出一種側(cè)面背投式無導(dǎo)光板窗式結(jié)構(gòu)的LED平板燈。采用多窗格組合以實現(xiàn)大面積照明， LED燈珠發(fā)出的發(fā)散光束，通過柱面透鏡會聚并掠射在出光面板上，出光面板為透射型擴(kuò)散板。由于光線沒有經(jīng)過多次反射損失，所以無導(dǎo)光板LED平板燈比一般導(dǎo)光板式LED平板燈的出光效率高,具有光效高，成本低，厚度薄、重量輕等優(yōu)點。文中優(yōu)化設(shè)計了背光源的結(jié)構(gòu)。采用柱面透鏡將側(cè)面入射的LED發(fā)散光束會聚在出光面板上，并通過掠射和疊加方法實現(xiàn)出光面板的照度均勻性�；诠舛葘W(xué)和幾何光學(xué)的基本原理，討論了LED陣列之間的距離，LED燈珠的投射角，以及LED陣列中LED的間距對平板燈光照度分布均勻性的影響，利用九宮格取值法和TracePro軟件對所設(shè)計的LED平板燈進(jìn)行參數(shù)優(yōu)化。并基于“煙囪效應(yīng)”設(shè)計了壁掛式LED平板燈散熱裝置。利用平板燈框架內(nèi)的空腔形成“煙囪”結(jié)構(gòu)，根據(jù)熱空氣密度小，易上浮的原理，使LED燈條后方管道內(nèi)的空氣快速上升流動進(jìn)行散熱，，并且設(shè)計波浪條紋的凸起部位，可顯著加快LED燈珠背面的空氣流速，有助于散熱效率的提高。還設(shè)計了一種用于LED平板燈的低功耗LED點陣式驅(qū)動電路。采用新型連線結(jié)構(gòu)和驅(qū)動方式，使LED驅(qū)動電路中盡量不含耗能元件,如:電阻及功率管等，運用電容可在交流下產(chǎn)生的容抗特性,限制電路中工作電流，從而降低LED驅(qū)動電源的功耗。 研究了一種適用于無導(dǎo)光板側(cè)入掠射式LED平板燈的雙面三棱柱陣列微結(jié)構(gòu)擴(kuò)散板。通過菲涅爾公式理論分析雙面三棱柱陣列增透原理，利用光線追跡軟件TracePro模擬仿真了三棱柱陣列深寬比和三棱柱底邊寬度對擴(kuò)散板透射比的影響。模擬結(jié)果表明，入射面的透射比隨深寬比的增大而增大，對于PMMA和PC光學(xué)材料，當(dāng)深寬比為0.5左右時透射比達(dá)到最大，并基本保持不變。出射面三棱柱陣列微結(jié)構(gòu)深寬比在0.5附近由于兩次全內(nèi)反射導(dǎo)致透射比出現(xiàn)一個下降區(qū)域，而三棱柱陣列間距對擴(kuò)散板的透射比影響很小，模擬結(jié)果表明優(yōu)化后的三棱柱微結(jié)構(gòu)陣列擴(kuò)散板對掠射光線的透光率可達(dá)93%。根據(jù)優(yōu)化后的雙面三棱柱陣列微結(jié)構(gòu)擴(kuò)散板相關(guān)參數(shù)，采用激光打標(biāo)機(jī)實驗制作了三棱柱陣列微結(jié)構(gòu)磨具，利用熱壓法模壓成型制得雙面三棱柱陣列微結(jié)構(gòu)的PMMA擴(kuò)散板。并對PMMA擴(kuò)散板的均勻性、出光效率和配光曲線等進(jìn)行測試。實驗測試結(jié)果與理論模擬結(jié)果相吻合。
[Abstract]:Energy-intensive problems have become the focus of people's attention in the new era. In terms of lighting, energy-saving and green-friendly LED products are becoming more and more active in the indoor lighting market. However, the existing light guide plate side-in LED flat-plate lamp has the advantages of low light-emitting efficiency and high manufacturing cost. Aiming at the problem of LED panel lamp, this thesis studies a kind of side projection type non-light guide plate LED flat lamp, and designs the structure, backlight, heat dissipation, light exit surface diffusion plate and driving circuit of the plate lamp, so as to improve the whole light effect of the LED flat lamp without light guide plate. Based on the concept of architectural design and people's daily lighting habits, a kind of LED flat plate with side projection type without light guide plate is proposed. a multi-pane combination is adopted to realize large-area illumination, a diverging light beam emitted by the LED lamp bead is converged by a cylindrical lens and is swept on the light-emitting panel, and the light-emitting panel is a transmission-type diffusion, And the light-emitting efficiency is high, the cost is low, the thickness is thin, the light is light, and the like. Point. The design of the backlight's junction is optimized. a cylindrical lens is adopted for converging the LED divergent light beam which is incident on the side surface on the light-emitting panel, and the illumination uniformity of the light-emitting panel is realized by a grazing incidence and a superposition method, The paper discusses the influence of the distance between the LED array, the projection angle of the LED lamp bead and the distance of the LED in the LED array on the uniformity of the distribution of the illumination of the flat-panel lamp. The heat dissipation of the wall-mounted LED panel lamp is designed based on the "chimney effect". by using the cavity in the plate lamp frame to form a "chimney" structure, the air in the rear pipeline of the LED light bar is rapidly rising and flowing for heat dissipation according to the principle of small heat air density and easy to float, and the convex part of the wave stripe is designed, so that the air flow on the back of the LED lamp bead can be obviously accelerated, Speed, which is helpful to the extraction of heat dissipation efficiency The invention also designs a low-power consumption LED dot matrix type driving electricity for an LED panel lamp, The circuit adopts a new connecting structure and a driving mode, so that the LED driving circuit does not contain energy-consuming components as much as possible, such as a resistor and a power tube and the like, and the capacitance can be used for capacitance-resistance characteristic generated under the alternating current, the working current in the circuit is limited, and the work of the LED driving power supply is reduced. In this paper, a double-sided triangular prism array micro-structure suitable for a non-light-guide-plate side-in-one LED panel lamp is studied. The diffusion plate is analyzed by the Fresnel formula theory, and the transmittance of the three-prism array and the width of the three-prism bottom edge to the diffusion plate are simulated by using the ray tracing software TracePro simulation. The simulation results show that the transmittance of the incident surface is increased with the increase of the aspect ratio, and for PMMA and PC optical materials, the transmittance reaches the maximum when the aspect ratio is about 0.5, and is basically guaranteed. The ratio of the depth-to-width ratio of the three-prism array with the exit surface due to the two total internal reflection in the vicinity of 0.5 causes a falling area of the transmittance, and the space of the triangular prism array is opposite to the transmittance of the diffusion plate. The simulation results show that the light transmittance of the three-prism micro-array diffusion plate to the grazing incidence light can reach as high as possible. according to the related parameters of the optimized double-sided triangular prism array micro-structure diffusion plate, a three-prism array micro-structured grinding tool is manufactured by adopting a laser marking machine experiment, the diffusion plate, and the uniformity, the light-emitting efficiency and the light distribution curve of the PMMA diffusion plate, Line test. Test results and theoretical simulation results
【學(xué)位授予單位】：華僑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM923.34
本文編號：2465511
[Abstract]:Energy-intensive problems have become the focus of people's attention in the new era. In terms of lighting, energy-saving and green-friendly LED products are becoming more and more active in the indoor lighting market. However, the existing light guide plate side-in LED flat-plate lamp has the advantages of low light-emitting efficiency and high manufacturing cost. Aiming at the problem of LED panel lamp, this thesis studies a kind of side projection type non-light guide plate LED flat lamp, and designs the structure, backlight, heat dissipation, light exit surface diffusion plate and driving circuit of the plate lamp, so as to improve the whole light effect of the LED flat lamp without light guide plate. Based on the concept of architectural design and people's daily lighting habits, a kind of LED flat plate with side projection type without light guide plate is proposed. a multi-pane combination is adopted to realize large-area illumination, a diverging light beam emitted by the LED lamp bead is converged by a cylindrical lens and is swept on the light-emitting panel, and the light-emitting panel is a transmission-type diffusion, And the light-emitting efficiency is high, the cost is low, the thickness is thin, the light is light, and the like. Point. The design of the backlight's junction is optimized. a cylindrical lens is adopted for converging the LED divergent light beam which is incident on the side surface on the light-emitting panel, and the illumination uniformity of the light-emitting panel is realized by a grazing incidence and a superposition method, The paper discusses the influence of the distance between the LED array, the projection angle of the LED lamp bead and the distance of the LED in the LED array on the uniformity of the distribution of the illumination of the flat-panel lamp. The heat dissipation of the wall-mounted LED panel lamp is designed based on the "chimney effect". by using the cavity in the plate lamp frame to form a "chimney" structure, the air in the rear pipeline of the LED light bar is rapidly rising and flowing for heat dissipation according to the principle of small heat air density and easy to float, and the convex part of the wave stripe is designed, so that the air flow on the back of the LED lamp bead can be obviously accelerated, Speed, which is helpful to the extraction of heat dissipation efficiency The invention also designs a low-power consumption LED dot matrix type driving electricity for an LED panel lamp, The circuit adopts a new connecting structure and a driving mode, so that the LED driving circuit does not contain energy-consuming components as much as possible, such as a resistor and a power tube and the like, and the capacitance can be used for capacitance-resistance characteristic generated under the alternating current, the working current in the circuit is limited, and the work of the LED driving power supply is reduced. In this paper, a double-sided triangular prism array micro-structure suitable for a non-light-guide-plate side-in-one LED panel lamp is studied. The diffusion plate is analyzed by the Fresnel formula theory, and the transmittance of the three-prism array and the width of the three-prism bottom edge to the diffusion plate are simulated by using the ray tracing software TracePro simulation. The simulation results show that the transmittance of the incident surface is increased with the increase of the aspect ratio, and for PMMA and PC optical materials, the transmittance reaches the maximum when the aspect ratio is about 0.5, and is basically guaranteed. The ratio of the depth-to-width ratio of the three-prism array with the exit surface due to the two total internal reflection in the vicinity of 0.5 causes a falling area of the transmittance, and the space of the triangular prism array is opposite to the transmittance of the diffusion plate. The simulation results show that the light transmittance of the three-prism micro-array diffusion plate to the grazing incidence light can reach as high as possible. according to the related parameters of the optimized double-sided triangular prism array micro-structure diffusion plate, a three-prism array micro-structured grinding tool is manufactured by adopting a laser marking machine experiment, the diffusion plate, and the uniformity, the light-emitting efficiency and the light distribution curve of the PMMA diffusion plate, Line test. Test results and theoretical simulation results
【學(xué)位授予單位】：華僑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM923.34
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