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公开(公告)号：US12210179B2
公开(公告)日：2025-01-28
申请号：US18368021
申请日：2023-09-14
Applicant: DARFON ELECTRONICS CORP.
Inventor： Chao-Yu Chen
Abstract: A backlight keyswitch includes a backlight module and a keyswitch body having a cap with a symbol. The backlight module disposed under the cap includes a light guide plate, a light-blocking sheet, a backlight circuit board having first, third, and second lighting units disposed in the light guide plate and arranged sequentially along a longitudinal direction for emitting first, third, and second color lights respectively, and a micro optical layer. The light-blocking sheet is located above the backlight circuit board and has a transparent region. The light guide plate is located between the light-blocking sheet and the backlight circuit board. The micro optical layer is parallel to the light guide plate and formed corresponding to the transparent region to guide the first, second, and third color lights to the symbol and has first and second clearance regions respectively adjacent to the first and second lighting units in the longitudinal direction.
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公开(公告)号：US12027326B2
公开(公告)日：2024-07-02
申请号：US18343881
申请日：2023-06-29
Applicant: Darfon Electronics Corp.
Inventor： Chao-Yu Chen
IPC: H01H13/83
CPC classification number: H01H13/83 , H01H2219/044 , H01H2219/06 , H01H2219/062
Abstract: A backlit-module-embedded illuminated keyswitch structure includes a baseplate, a mask film disposed below the baseplate and having a first coating for substantially reflecting a light and a second coating for substantially blocking the light, a light guide sheet at one side of the mask film and having a light source hole, and a reflective layer at one side of the light guide sheet opposite to the mask film. The second coating includes a second main coating region and a plurality of second coating sub-regions, which extends outward from the second main coating region and is arranged along the periphery of the second main coating region to form a plurality of intermediary regions therebetween. The first coating and the second coating are disposed right above the light source hole. The first coating is at least partially located in the intermediary regions.
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公开(公告)号：US20240134112A1
公开(公告)日：2024-04-25
申请号：US18376818
申请日：2023-10-03
Applicant: DARFON ELECTRONICS CORP.
Inventor： Chao-Yu Chen , Heng-Yi Huang
CPC classification number: G02B6/0091 , G02B6/0068 , H01H13/023 , H01H2219/06 , H01H2219/062
Abstract: A lighting keyboard includes a backlight module and at least one keyswitch. The backlight module includes a lighting unit, a light guide panel, and a lighting board for illuminating a keycap of the keyswitch. The light guide panel includes a panel hole to accommodate the lighting unit. The light guide panel further includes plural slots intervally surrounding the lighting unit. The lighting board includes a micro-structure region facing toward the light guide panel. Each of the slots of the light guide panel has a bulge portion protruding to the lighting unit. At two sides of the bulge portion, each of the slots forms two slots walls with an obtuse angle, thereby expanding the transmitting angle for the multi-color lights from the lighting unit and enhancing the light-mixing uniformity while illuminating the keycap.
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公开(公告)号：US11860398B2
公开(公告)日：2024-01-02
申请号：US18296244
申请日：2023-04-05
Applicant: DARFON ELECTRONICS CORP.
Inventor： Chao-Yu Chen
IPC: F21V8/00
CPC classification number: G02B6/0045 , G02B6/0068
Abstract: A backlight apparatus used in an illuminated keyboard includes a light-guiding plate, a circuit board and a plurality of light-emitting devices all electrically bonded on the circuit board. The light-guiding plate has a plurality of through holes which each corresponds to one of the light-emitting devices. The circuit board is disposed on a back face of the light-guiding plate such that each light-emitting device is disposed within the corresponding through hole, and that a light-emitting side face of each light-emitting device faces a light incident surface of the corresponding through hole. A specific through hole of the through holes has an optical adjustment surface on the light incident surface thereof, and the optical adjustment surface has a curved surface central axis coaxial with a central optical axis of the corresponding light-emitting device.
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公开(公告)号：US20230197374A1
公开(公告)日：2023-06-22
申请号：US18081702
申请日：2022-12-15
Applicant: DARFON ELECTRONICS CORP.
Inventor： Chao-Yu Chen
CPC classification number: H01H13/83 , G02B6/0088 , H01H2219/058
Abstract: A backlight keyboard includes a first keyswitch, a first backlight source, a light guide plate and a first board having first and second holes. The light guide plate is applied to the backlight keyboard and a second backlight keyboard including a second keyswitch, a second backlight source and a second board having third and fourth holes. The second keyswitch on the second backlight keyboard is shifted transversely relative to the first keyswitch on the backlight keyboard to make the first and fourth holes have a first overlapping area. The light guide plate has a first dot structure corresponding to the first and third holes and a second dot structure corresponding to the second and fourth holes except the first overlapping area for guiding light to symbols on the first and second keyswitches. The first dot structure is less than the second dot structure in dot intensity.
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Patent Agency Ranking
公开(公告)号：US20230067471A1
公开(公告)日：2023-03-02
申请号：US17873128
申请日：2022-07-25
Applicant: DARFON ELECTRONICS CORP.
Inventor： Chao-Yu Chen
Abstract: A back light module is applied to a lighting keyboard with a plurality of keyswitches and includes a lighting unit, a light guide plate, a light penetrating membrane, a light calibration layer and an adhering component. The light guide plate has an opening used to accommodate the lighting unit. The light penetrating membrane is disposed on the light guide plate. The light calibration layer is disposed on the light penetrating membrane and has a second contour. The adhering component is disposed between the light guide plate and the light penetrating membrane, and has a first contour greater than the second contour. The adhering component includes a front region, a rear region and a hollow region. The front region is covered by the light calibration layer. The rear region is partly covered or not covered by the light calibration layer. The hollow region corresponds to and is larger than the opening.
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公开(公告)号：US20220164038A1
公开(公告)日：2022-05-26
申请号：US17534463
申请日：2021-11-24
Applicant: DARFON ELECTRONICS CORP.
Inventor： Chao-Yu Chen
Abstract: A backlight keyboard includes a first language keyswitch set having adjacent first and second keyswitches, a first backlight module disposed under the first language keyswitch set, and a masking sheet. The masking sheet is suitable for the backlight keyboard and a second backlight keyboard including a second backlight module and a second language keyswitch set. The first and second keyswitches on the backlight keyboard coincide with a third keyswitch in the second language keyswitch set on the second backlight keyboard. The masking sheet has a first light-exit region layout corresponding to the first, second, and third keyswitches for allowing light to be incident to symbols on the first, second, and third keyswitches. In other words, the masking sheet of the present invention can be applied to different backlight keyboards having different language keyswitch sets.
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公开(公告)号：US12271021B2
公开(公告)日：2025-04-08
申请号：US18052233
申请日：2022-11-03
Applicant: Darfon Electronics Corp.
Inventor： Chao-Yu Chen
IPC: F21V8/00
Abstract: An optical module for a luminous keyboard includes a mask film having a mask pattern, a patterned layer disposed on the mask film, and a light guide sheet disposed on one side of the mask film. The mask pattern defines a plurality of light-transparent regions respectively corresponding to a plurality of keyswitches of the luminous keyboard. The patterned layer has a light transmittance larger than that of the mask pattern. The light guide sheet has a light-exit edge, and a vertical projection of the light-exit edge of the light guide sheet on the mask film at least partially falls within an outer light-transparent region of the plurality of light-transparent regions. The patterned layer is at least partially located in the outer light-transparent region and adjacent to a region boundary of the outer light-transparent region.
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公开(公告)号：US12259574B2
公开(公告)日：2025-03-25
申请号：US18376818
申请日：2023-10-04
Applicant: DARFON ELECTRONICS CORP.
Inventor： Chao-Yu Chen , Heng-Yi Huang
Abstract: A lighting keyboard includes a backlight module and at least one keyswitch. The backlight module includes a lighting unit, a light guide panel, and a lighting board for illuminating a keycap of the keyswitch. The light guide panel includes a panel hole to accommodate the lighting unit. The light guide panel further includes plural slots intervally surrounding the lighting unit. The lighting board includes a micro-structure region facing toward the light guide panel. Each of the slots of the light guide panel has a bulge portion protruding to the lighting unit. At two sides of the bulge portion, each of the slots forms two slots walls with an obtuse angle, thereby expanding the transmitting angle for the multi-color lights from the lighting unit and enhancing the light-mixing uniformity while illuminating the keycap.
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公开(公告)号：US20250062082A1
公开(公告)日：2025-02-20
申请号：US18804146
申请日：2024-08-14
Applicant: DARFON ELECTRONICS CORP.
Inventor： Heng-Yi Huang , Chao-Yu Chen , Hsin-Cheng Ho
Abstract: An illuminated touchpad includes a panel, a light guide layer and a circuit board. The panel includes a first light transmitting region and a second light transmitting region. The light guide layer includes a first light guide region and a second light guide region. The circuit board includes a controller, a touch module, a first light source and a second light source. The controller controls the first light source to emit light, such that the first light guide region guides the light emitted by the first light source to the first light transmitting region. When the touch module senses that the first light transmitting region is touched, the controller controls the second light source to emit light, such that the second light guide region guides the light emitted by the second light source to the second light transmitting region.
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