Mini-LED backlight has emerged as a promising technology for high performance LCDs,yet the massive detection of dead pixels and precise LEDs placement are constrained by the miniature scale of the Mini-LEDs.The high-r...Mini-LED backlight has emerged as a promising technology for high performance LCDs,yet the massive detection of dead pixels and precise LEDs placement are constrained by the miniature scale of the Mini-LEDs.The high-resolution network(Hrnet)with mixed dilated convolution and dense upsampling convolution(MDC-DUC)module and a residual global context attention(RGCA)module has been proposed to detect the quality of vehicular Mini-LED backlights.The proposed model outperforms the baseline networks of Unet,Pspnet,Deeplabv3+,and Hrnet,with a mean intersection over union(Miou)of 86.91%.Furthermore,compared to the four baseline detection networks,our proposed model has a lower root-mean-square error(RMSE)when analyzing the position and defective count of Mini-LEDs in the prediction map by canny algorithm.This work incorporates deep learning to support production lines improve quality of Mini-LED backlights.展开更多
A zinc oxide ZnO field emitter-based backlight unit for liquid crystal display with a gated structure is fabricated by screen-printing processes.The measured anode field emission current density reaches 0.62 mA/cm2 wh...A zinc oxide ZnO field emitter-based backlight unit for liquid crystal display with a gated structure is fabricated by screen-printing processes.The measured anode field emission current density reaches 0.62 mA/cm2 when the applied gate voltage is 570 V.Part of the anode current is contributed by the secondary electron emission which is excited from the MgO layer inside the gate apertures on the gate plate. The average emission current density and luminance are 0.47 mA/cm2 and 1 250 cd/m2 respectively with a fluctuation of about 10% during the 1 000 min measurement.By a finite element method calculation the gated structure shows a good electron beam focusing property. The driving performance of the backlight unit is characterized by SPICE simulation tools and measured by the oscilloscope. Stable field emission line-by-line scanning and fast response characteristics of the backlight unit indicate its promising application in the liquid crystal displays.展开更多
基金National Natural Science Foundation of China(Grant Nos.62275227,62274138,and 11904302)Project of Ministry of Industry and Information Technology of China(Grant No.246)+2 种基金Science and Technology Project of Fujian Province(Grant Nos.2023H4028 and 2023H6038)Key Research and Industrialization Projects of Technological Innovation of Fujian Province(Grant No.2023G043)Shenzhen Science and Technology Program(Grant No.JCYJ20220530143407017).
文摘Mini-LED backlight has emerged as a promising technology for high performance LCDs,yet the massive detection of dead pixels and precise LEDs placement are constrained by the miniature scale of the Mini-LEDs.The high-resolution network(Hrnet)with mixed dilated convolution and dense upsampling convolution(MDC-DUC)module and a residual global context attention(RGCA)module has been proposed to detect the quality of vehicular Mini-LED backlights.The proposed model outperforms the baseline networks of Unet,Pspnet,Deeplabv3+,and Hrnet,with a mean intersection over union(Miou)of 86.91%.Furthermore,compared to the four baseline detection networks,our proposed model has a lower root-mean-square error(RMSE)when analyzing the position and defective count of Mini-LEDs in the prediction map by canny algorithm.This work incorporates deep learning to support production lines improve quality of Mini-LED backlights.
基金The National Basic Research Program of China(973 Program)(No.2013CB328803)the National Natural Science Foundation of China(No.51002031)+1 种基金the Ph.D.Programs Foundation of Ministry of Education of China(No.20100092120022)the National High Technology Research and Development Program of China(863 Program)(No.2012AA03A302,2013AA011004)
文摘A zinc oxide ZnO field emitter-based backlight unit for liquid crystal display with a gated structure is fabricated by screen-printing processes.The measured anode field emission current density reaches 0.62 mA/cm2 when the applied gate voltage is 570 V.Part of the anode current is contributed by the secondary electron emission which is excited from the MgO layer inside the gate apertures on the gate plate. The average emission current density and luminance are 0.47 mA/cm2 and 1 250 cd/m2 respectively with a fluctuation of about 10% during the 1 000 min measurement.By a finite element method calculation the gated structure shows a good electron beam focusing property. The driving performance of the backlight unit is characterized by SPICE simulation tools and measured by the oscilloscope. Stable field emission line-by-line scanning and fast response characteristics of the backlight unit indicate its promising application in the liquid crystal displays.
