High-Uniformity Planar Mini-Chip-Scale Packaged LEDs with Quantum Dot Converter for White Light Source
Abstract This study proposes a novel direct-lit mini-chip-scale packaged light-emitting diode (mini-CSPLED) backlight unit (BLU) that used quantum dot (QD) film, diffusion plate, and two prism films to improve brightness uniformity. Three different luminous intensity units, 120° mini-CSPLED, 150° mi...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2019-05-01
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| Series: | Nanoscale Research Letters |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s11671-019-2993-z |
| _version_ | 1797719615991709696 |
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| author | Lung-Chien Chen Ching-Ho Tien De-Fu Chen Zhi-Ting Ye Hao-Chung Kuo |
| author_facet | Lung-Chien Chen Ching-Ho Tien De-Fu Chen Zhi-Ting Ye Hao-Chung Kuo |
| author_sort | Lung-Chien Chen |
| collection | DOAJ |
| description | Abstract This study proposes a novel direct-lit mini-chip-scale packaged light-emitting diode (mini-CSPLED) backlight unit (BLU) that used quantum dot (QD) film, diffusion plate, and two prism films to improve brightness uniformity. Three different luminous intensity units, 120° mini-CSPLED, 150° mini-CSPLED, and 180° mini-CSPLED with different emission angle structures were fabricated using a CSP process. In terms of component characteristics, although the 180° mini-CSPLED light output power is about loss 4% (at 10 mA) compared with 150° mini-CSPLED, it has a large emission angle that forms a planar light source that contributes to improving the BLU brightness uniformity and reduced quantity of LEDs at the same area. In terms of BLU analysis, the blue mini-CSPLEDs with different emission angles excite the different QD film thicknesses; the chromaticity coordinates conversion to the white light region. The BLU brightness increases as the QD film thickness increases from 60, 90, and 150 μm. This result can achieve a brightness uniformity of 86% in a 180° mini-CSPLED BLU + 150-μm-thick QD films as compared to the 120° mini-CSPLED BLU and 150° mini-CSPLED BLU. |
| first_indexed | 2024-03-12T09:07:35Z |
| format | Article |
| id | doaj.art-1bad4b86e8b244ce8011ca55b6780579 |
| institution | Directory Open Access Journal |
| issn | 1931-7573 1556-276X |
| language | English |
| last_indexed | 2024-03-12T09:07:35Z |
| publishDate | 2019-05-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nanoscale Research Letters |
| spelling | doaj.art-1bad4b86e8b244ce8011ca55b67805792023-09-02T15:11:01ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2019-05-0114111010.1186/s11671-019-2993-zHigh-Uniformity Planar Mini-Chip-Scale Packaged LEDs with Quantum Dot Converter for White Light SourceLung-Chien Chen0Ching-Ho Tien1De-Fu Chen2Zhi-Ting Ye3Hao-Chung Kuo4Department of Electro-optical Engineering, National Taipei University of TechnologyDepartment of Electro-optical Engineering, National Taipei University of TechnologyDepartment of Electro-Optical Engineering, National United UniversityDepartment of Electro-Optical Engineering, National United UniversityDepartment of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung UniversityAbstract This study proposes a novel direct-lit mini-chip-scale packaged light-emitting diode (mini-CSPLED) backlight unit (BLU) that used quantum dot (QD) film, diffusion plate, and two prism films to improve brightness uniformity. Three different luminous intensity units, 120° mini-CSPLED, 150° mini-CSPLED, and 180° mini-CSPLED with different emission angle structures were fabricated using a CSP process. In terms of component characteristics, although the 180° mini-CSPLED light output power is about loss 4% (at 10 mA) compared with 150° mini-CSPLED, it has a large emission angle that forms a planar light source that contributes to improving the BLU brightness uniformity and reduced quantity of LEDs at the same area. In terms of BLU analysis, the blue mini-CSPLEDs with different emission angles excite the different QD film thicknesses; the chromaticity coordinates conversion to the white light region. The BLU brightness increases as the QD film thickness increases from 60, 90, and 150 μm. This result can achieve a brightness uniformity of 86% in a 180° mini-CSPLED BLU + 150-μm-thick QD films as compared to the 120° mini-CSPLED BLU and 150° mini-CSPLED BLU.http://link.springer.com/article/10.1186/s11671-019-2993-zMini-CSPLEDQuantum dotGaNBacklight |
| spellingShingle | Lung-Chien Chen Ching-Ho Tien De-Fu Chen Zhi-Ting Ye Hao-Chung Kuo High-Uniformity Planar Mini-Chip-Scale Packaged LEDs with Quantum Dot Converter for White Light Source Nanoscale Research Letters Mini-CSPLED Quantum dot GaN Backlight |
| title | High-Uniformity Planar Mini-Chip-Scale Packaged LEDs with Quantum Dot Converter for White Light Source |
| title_full | High-Uniformity Planar Mini-Chip-Scale Packaged LEDs with Quantum Dot Converter for White Light Source |
| title_fullStr | High-Uniformity Planar Mini-Chip-Scale Packaged LEDs with Quantum Dot Converter for White Light Source |
| title_full_unstemmed | High-Uniformity Planar Mini-Chip-Scale Packaged LEDs with Quantum Dot Converter for White Light Source |
| title_short | High-Uniformity Planar Mini-Chip-Scale Packaged LEDs with Quantum Dot Converter for White Light Source |
| title_sort | high uniformity planar mini chip scale packaged leds with quantum dot converter for white light source |
| topic | Mini-CSPLED Quantum dot GaN Backlight |
| url | http://link.springer.com/article/10.1186/s11671-019-2993-z |
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