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公开(公告)号：US20240297154A1
公开(公告)日：2024-09-05
申请号：US17768482
申请日：2020-08-31
发明人： Tailiang GUO , Penghui LIU , Yongai ZHANG , Xiongtu ZHOU , Chaoxing WU , Zhixian LIN , Lei SUN , Qun YAN
IPC分类号： H01L25/075 , H10K59/95
CPC分类号： H01L25/0753 , H10K59/95
摘要： The present invention relates to a full-color μLED display device without electrical contact and mass transfer. The full-color μLED display device without electrical contact and mass transfer comprises a lower driving electrode disposed on a surface of a lower transparent substrate, optical micro-structures disposed on an upper surface and a lower surface of an upper transparent substrate, an upper driving electrode, a barrier micro-structure connecting the upper transparent substrate and the lower transparent substrate, a μLED crystal grain disposed in the barrier micro-structure, wavelength down-conversion light emitting layers, an insulating layer and a control module, wherein a unit R for displaying red light, a unit G for displaying green light and a unit B for displaying blue light are successively formed on the barrier micro-structure along a direction of the upper driving electrode. The upper driving electrode and the lower driving electrode are free from electrical contact with the μLED crystal grain. The control module provides an alternating driving signal and electrical coupling to lighten the μLED crystal grain so as to excite the wavelength down-conversion light emitting layers to realize full color display, so that there are no complicated manufacturing process for a three-primary-color μLED chip in a full color μLED device and complicated Bonding and mass transfer processes of a light emitting chip and a driving chip, the manufacturing period of μLED display is shortened, and the manufacturing cost is lowered.
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2.发明公开公开(公告)号：US20230352642A1
公开(公告)日：2023-11-02
申请号：US17768472
申请日：2020-08-31
发明人： Yongai ZHANG , Shiyao CHEN , Tailiangi GUO , Xiongtu ZHOU , Chaoxing WU , Zhixian LIN , Lei SUN , Qun YAN
IPC分类号： H01L25/075 , H01L33/62 , H01L33/50
CPC分类号： H01L33/62 , H01L25/0756 , H01L33/507 , H01L2933/0066
摘要： The present invention relates to a full-color µLED micro-display device without electrical contact and a manufacturing method therefor. The device includes a lower driving electrode and a reflective layer arranged on a surface of the lower transparent substrate, an upper driving electrode and a diffusion layer arranged on a surface of the upper transparent substrate, a wavelength down-conversion light-emitting layer and a blue µLED grain arranged between the upper and lower driving electrodes, and a control module and a color filter film; the upper and lower driving electrodes are in no electrical contact with the blue µLED grain, the control module is in an electrical contact with the upper and lower driving electrodes, and the control module provides an alternating driving signal for controlling the µLED grain to excite a first light source which is converted into a second light source after passing through the wavelength down-conversion light-emitting layer, and after passing through the reflective layer and the diffusion layer, the first and second light sources achieve the full-color µLED micro-display through the color filter film. The present invention can effectively avoid the complex process for manufacturing tricolor µLED chips in the full-color µLED device, as well as the complex bonding and mass transfer processes for the light-emitting chip and the driving chip, thereby shortening the cycle for manufacturing a µLED display, and cutting down the production cost.
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3.发明公开公开(公告)号：US20230197882A1
公开(公告)日：2023-06-22
申请号：US17768476
申请日：2020-08-31
发明人： Yongai ZHANG , Xuyang WENG , Tailiang GUO , Xiongtu ZHOU , Chaoxing WU , Zhixian LIN , Lei SUN , Qun YAN
CPC分类号： H01L33/0004 , H01L33/502 , H01L33/58 , H01L33/60
摘要： The present invention relates to a μLED light emitting device without electrical contact based on a wavelength down-conversion. The μLED light emitting device without electrical contact comprises μLED crystal grains, wavelength down-conversion light emitting lavers, ate upper driving electrode and a lower driving electrode, insulators, an optical micro-structure and a control module. The upper driving electrode and the lower driving electrode are free from direct electrical contact with each of the μLED crystal grains, the control module is electrically connected with the upper driving electrode and the lower driving electrode respectively to provide alternating driving signals to the upper driving electrode and the lower driving electrode so as to form a driving electric field, and the driving electric field controls an electron-hole recombination of the μLED crystal grain and emits a first light source which is converted into a second light source via the wavelength down-conversion light emitting layer. As a driving electrode in the μLED light emitting device without electrical contact based on the wavelength down-conversion provided by the present invention is free from electrical contact with a p-type semiconductor layer and an n-type semiconductor layer in the μLED crystal grain, there are no complicated manufacturing process of a chip in the μLED light emitting device and bonding and mass transfer processes of the μLED chip and a driving chip, so that the production cycle of the μLED light emitting device is shortened effectively and the manufacturing cost of the μLED light emitting device is reduced effectively.
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