集成化导光板下表面微棱镜二维分布设计
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摘要
集成化导光板下表面微结构分布是影响背光模组出射光均匀性的关键因素,因此是背光模组设计的重点之一.本文针对微棱镜一维分布设计中存在的大面积同一性影响背光模组亮度均匀性的问题,提出一种集成化导光板下表面微棱镜二维分布的设计思想,以提高背光模组的亮度均匀性.利用光学软件Lighttools对5.0英寸集成化导光板下表面微棱镜结构的较佳二维分布进行优化探索,通过与较佳的一维分布仿真结果对比分析可知,优化后的二维分布模式下,背光模组的光能利用率、照度均匀性、亮度均匀性分别达到92.03%,87.07%和91.94%,满足行业标准;其中,照度均匀性比一维分布提高了10%;同时,从亮度图观察,背光模组的整体亮度均匀性得到了有效提升.该研究结果对于背光模组轻薄化、集成化开发具有一定的参考价值.
The microstructure distribution on the bottom surface of the partial integrated light guide plate(PILGP)is the key to affecting the uniformity of the output light from the backlight module(BLM), which is one of the important factors in the BLM design. Based on the development trend of the BLM in light-weight and integration, many research institutes have realized the requirement for high luminance and luminance uniformity in the BLM by setting micro-prism structure on the surface of the light guide plate(LGP). In most of these studies, the length of the micro-prism structure is the same as the width of the LGP, and the optimization of the micro-prism distribution is performed only in the length direction of the LGP, which is a one-dimensional distribution. So, the long strip micro-prism structure cannot modulate the light in the axial direction, resulting in large area identity in the width direction of the LGP, thereby the luminance uniformity of the BLM is affected. In this paper, a design idea of two-dimensional distribution of the micro-prism on the bottom surface of the PILGP, which improves the luminance uniformity of the BLM, is proposed to solve the problem that the luminance uniformity is affected by large area identity caused by one-dimensional distribution design of the micro-prism. The small length micro-prism structure is used to break the limit of the axial distribution of the long strip micro-prism structure, and it can modulate the light in the axial direction. The Lighttools software is used to optimize the two-dimensional distribution of the micro-prism on the bottom surface of a 5.0-inch PILGP. Comparing with the PILGP with one-dimensional distribution of the micro-prism on the bottom surface, the simulation results show that the utilization of light energy, illuminance uniformity and luminance uniformity in the BLM with optimized two-dimensional distribution of the micro-prism on the bottom surface of the PILGP respectively reach 92.03%, 87.07% and 91.94%, which meet industry standards.And the illuminance uniformity increases by 10%. Meanwhile, the luminance diagram shows that the overall luminance uniformity of the BLM is improved effectively. Moreover, the distribution principle of the microprism on the bottom surface of the PILGP is analyzed and the physical mechanism is reasonably explained.The simulation results above show that the design concept of the two-dimensional distribution of micro-prism is feasible. The study results have a certain referential value for the development of the BLM in light-weight and integration.
The microstructure distribution on the bottom surface of the partial integrated light guide plate(PILGP)is the key to affecting the uniformity of the output light from the backlight module(BLM), which is one of the important factors in the BLM design. Based on the development trend of the BLM in light-weight and integration, many research institutes have realized the requirement for high luminance and luminance uniformity in the BLM by setting micro-prism structure on the surface of the light guide plate(LGP). In most of these studies, the length of the micro-prism structure is the same as the width of the LGP, and the optimization of the micro-prism distribution is performed only in the length direction of the LGP, which is a one-dimensional distribution. So, the long strip micro-prism structure cannot modulate the light in the axial direction, resulting in large area identity in the width direction of the LGP, thereby the luminance uniformity of the BLM is affected. In this paper, a design idea of two-dimensional distribution of the micro-prism on the bottom surface of the PILGP, which improves the luminance uniformity of the BLM, is proposed to solve the problem that the luminance uniformity is affected by large area identity caused by one-dimensional distribution design of the micro-prism. The small length micro-prism structure is used to break the limit of the axial distribution of the long strip micro-prism structure, and it can modulate the light in the axial direction. The Lighttools software is used to optimize the two-dimensional distribution of the micro-prism on the bottom surface of a 5.0-inch PILGP. Comparing with the PILGP with one-dimensional distribution of the micro-prism on the bottom surface, the simulation results show that the utilization of light energy, illuminance uniformity and luminance uniformity in the BLM with optimized two-dimensional distribution of the micro-prism on the bottom surface of the PILGP respectively reach 92.03%, 87.07% and 91.94%, which meet industry standards.And the illuminance uniformity increases by 10%. Meanwhile, the luminance diagram shows that the overall luminance uniformity of the BLM is improved effectively. Moreover, the distribution principle of the microprism on the bottom surface of the PILGP is analyzed and the physical mechanism is reasonably explained.The simulation results above show that the design concept of the two-dimensional distribution of micro-prism is feasible. The study results have a certain referential value for the development of the BLM in light-weight and integration.
引文
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[2]Xu P,Huang Y Y,Su Z J,Zhang X L 2014 Appl.Opt.531322
[3]Xu P,Huang Y Y,Su Z J,Zhang X L,Luo T Z,Peng W D2015 Opt.Express 23 4887
[4]Lin S F,Su C Y,Feng Z Y,Li X D 2017 J.Phys.D:Appl.Phys.50 1
[5]Wang Y J,Ouyang S H,Chao W C,Lu J G,Shieh D H P 2015 Opt.Express 23 1567
[6]Wang Y J,Lu J G,Chao W C,Shieh D H P 2015 Opt.Express 23 21443
[7]Oh S W,Kim N,Kim E S,An J W 2010 Korean J.Opt.Photon.21 247
[8]Chen C F,Kuo S H 2014 J.Disp.Technol.10 1030
[9]Fang Y C,Tzeng Y F,Wu K Y 2014 J.Disp.Technol.10840
[10]Joo B Y,Ko J H 2015 J.Opt.Soc.Korea 19 159
[11]Li C Y,Pan J W 2014 Appl.Opt.53 1503
[12]Chen B T,Pan J W 2015 Appl.Opt.54 E80
[13]Lee K L,He K Y 2011 J.Lightwave Technol.29 3327
[14]Xu P,Yan Z L,Wan L L,Huang H X 2004 Proceedings of SPIE Holography Diffractive Optics and Applications IIBeijing,China,November 8-11,2004 p66
[15]Xu P,Huang H X,Wang K,Ruan S C,Yang J,Wan L L,Chen X X,Liu J Y 2007 Opt.Express 15 809
[16]Huang H X,Xu P,Ruan S C,Yang T,Yuan X,Huang Y Y2015 Acta Phys.Sin.64 154212(in Chinese)[黄海璇,徐平,阮双琛,杨拓,袁霞,黄燕燕2015物理学报64 154212]
[17]Huang H X,Ruan S C,Yang T,Xu P 2015 Nano-Micro Lett.7 177
[18]Xu P,Hong C Q,Cheng G X,Zhou L,Sun Z L 2015 Opt.Express 23 6773
[19]Xu P,Yuan X,Huang H X,Yang T,Huang Y Y,Zhu T F,Tang S T,Peng W D 2016 Nanoscale Res.Lett.11 485
[20]Xu P,Yuan X,Yang T,Huang H X,Tang S T,Huang Y Y,Xiao Y F,Peng W D 2017 Acta Phys.Sin.66 124201(in Chinese)[徐平,袁霞,杨拓,黄海璇,唐少拓,黄燕燕,肖钰斐,彭文达2017物理学报66 124201]
[21]Xu P,Tang S T,Yuan X,Huang H X,Yang T,Luo T Z,Yu J 2018 Acta Phys.Sin.67 024202(in Chinese)[徐平,唐少拓,袁霞,黄海璇,杨拓,罗统政,喻珺2018物理学报67 024202]
[22]Xu P,Huang Y Y,Zhang X L,Huang J F,Li B B,Ye E,Duan S F,Su Z J 2013 J.Shenzhen Univ.Sci.Eng.30 428(in Chinese)[徐平,黄燕燕,张旭琳,黄洁锋,李贝贝,叶恩,段守富,苏志杰2013深圳大学理工学报30 428]
[23]Chen X X,Xu P,Huang J F,Zhang X L,Wang B,Li B B2009 Acta Opt.Sin.29 2516(in Chinese)[陈祥贤,徐平,黄洁锋,张旭琳,王冰,李贝贝2009光学学报29 2516]
[24]Xu P,Huang Y Y,Zhang X L,Huang J F,Li B B,Ye E,Duan S F,Su Z J 2013 Opt.Express 21 20159
[25]Xu P,Luo T Z,Zhang X L,Su Z J,Huang Y Y,Li X C,Zou Y 2018 Opt.Commun.427 589
[26]Kim Y C 2013 Optik 124 2171
[27]Luo S B 2007 Aviat.Precis.Manuf.Technol.43 1(in Chinese)[罗松保2007航空精密制造技术43 1]
[28]Shi J F,Zhang G G,Wang D S 2004 Micronano Electron.Technol.41 38(in Chinese)[史俊锋,张光国,王东生2004微纳电子技术41 38]
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