公开(公告)号：US20230350128A1

公开(公告)日：2023-11-02

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.

公开(公告)号：US20230343525A1

公开(公告)日：2023-10-26

申请号：US18297020

申请日：2023-04-07

Applicant: DARFON ELECTRONICS CORP.

Inventor： Ying-Lan Liu ,  Hsin-Cheng Ho ,  Heng-Yi Huang

IPC: H01H13/83 ,  H01H13/705 ,  F21V8/00 ,  H01H13/02 ,  H01H3/12

CPC classification number: H01H13/83 ,  H01H13/705 ,  G02B6/0055 ,  H01H13/023 ,  H01H3/125

Abstract: A backlight module is configured to illuminate at least one key cap. The backlight module includes a light emitting unit, a light guide plate and a lighting board. The light guide plate has a light guide hole for accommodating the light emitting unit. The lighting board has a pair of pads connected to the light emitting unit respectively. The lighting board includes a first reflective layer surrounding the light emitting unit and at least partially covering the pair of pads. Each of the pair of pads has a plurality of branches and at least one hollow area. The at least one hollow area overlaps with at least one part of the light emitting unit.

公开(公告)号：US20230341613A1

公开(公告)日：2023-10-26

申请号：US18343881

申请日：2023-06-29

Applicant: Darfon Electronics Corp.

Inventor： Chao-Yu CHEN

IPC: F21V8/00 ,  H01H13/83

CPC classification number: G02B6/0055 ,  G02B6/0035 ,  H01H13/83 ,  H01H2219/062 ,  H01H2219/06 ,  H01H2219/044

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.

公开(公告)号：US20230327448A1

公开(公告)日：2023-10-12

申请号：US18131357

申请日：2023-04-05

Applicant: DARFON ELECTRONICS CORP.

Inventor： Wei-Lin Liu

IPC: H02J3/32 ,  H02J3/38 ,  H02J7/00

CPC classification number: H02J3/32 ,  H02J2300/24 ,  H02J7/0063 ,  H02J3/381

Abstract: A power conversion system (PCS) includes an alternating current (AC) power port, a first direct current (DC) power port, a second DC power port, a high voltage capacitor, a first DC converter, a second DC converter, a power inverter, and a microcontroller unit. The microcontroller unit adjusts a frequency of an AC power output by the power conversion system based on a voltage difference across the high voltage capacitor of the power conversion system to switch the frequency of the AC power between different frequencies.

公开(公告)号：US20230305214A1

公开(公告)日：2023-09-28

申请号：US18128261

申请日：2023-03-30

Applicant: DARFON ELECTRONICS CORP.

Inventor： Chao-Yu Chen ,  Heng-Yi Huang ,  Hsin-Cheng Ho

IPC: F21V8/00 ,  H01H13/83 ,  H01H13/704

CPC classification number: G02B6/0031 ,  H01H13/83 ,  G02B6/0021 ,  H01H13/704 ,  G02B6/006 ,  H01H2219/044 ,  H01H2219/039

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 located on the light guide plate. The light penetrating membrane is located on the light penetrating membrane and has a second contour. The adhering component is located 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.

公开(公告)号：US11735380B2

公开(公告)日：2023-08-22

申请号：US18060070

申请日：2022-11-30

Applicant: Darfon Electronics Corp.

Inventor： Chen Yang ,  Chia-Hung Liu ,  Yu-Chun Hsieh

IPC: H01H13/14 ,  H01H13/20 ,  H01H13/04 ,  H01H13/70

CPC classification number: H01H13/20 ,  H01H13/04 ,  H01H13/14 ,  H01H13/70 ,  H01H2233/07

Abstract: A keyswitch structure includes a base, a cap disposed corresponding to the base, a restoring member disposed between the base and the cap, and a tactile adjustment unit. The cap has a cam portion movable relative to the base. The restoring member is configured to provide a restoring force to enable the cam portion to move away from the base. The tactile adjustment unit is disposed corresponding to the cam portion and includes a holder and a tactile feedback member mounted on the holder. The holder is movable relative to the base to change a position of the tactile feedback member relative to the cam portion, so as to change a pressing force required for the cam portion to move toward the base.

公开(公告)号：US20230245843A1

公开(公告)日：2023-08-03

申请号：US18132433

申请日：2023-04-10

Applicant: DARFON ELECTRONICS CORP.

Inventor： Zheng-Hong Lai ,  Chih-Ho Hsu ,  Chin-Lung Chan

IPC: H01H13/705 ,  H01H13/83

CPC classification number: H01H13/705 ,  H01H13/83 ,  H01H2221/07 ,  H01H2223/044

Abstract: A keyswitch structure includes a switch and a multilayer structure above the switch. The multilayer structure includes an inner flexible layer, a rigid light-transmissive cover sheet, and a flexible light-transmissive layer. The inner flexible layer has a keycap portion and a connection portion extending outward from the keycap portion. The keycap portion is located above the switch and forms a spatial character structure. The rigid light-transmissive cover sheet is disposed on the keycap portion and covers the spatial character structure. The flexible light-transmissive layer covers the inner flexible layer and the rigid light-transmissive cover sheet. A keyboard includes the keyswitch structure and a device casing carrying the keyswitch structure. The multilayer structure is fixed to the device casing. The rigid light-transmissive cover sheet is harder than the flexible light-transmissive layer and structurally protects the spatial character structure from being damaged when the keyswitch structure is pressed.

公开(公告)号：US20230207236A1

公开(公告)日：2023-06-29

申请号：US18179420

申请日：2023-03-07

Applicant: Darfon Electronics Corp.

Inventor： Hsin-Hung LIU ,  Chao-Yu CHEN ,  Heng-Yi Huang ,  Hsin-Cheng Ho

IPC: H01H13/83 ,  G06F3/02 ,  F21V8/00

CPC classification number: H01H13/83 ,  G06F3/021 ,  G02B6/0035 ,  H01H2219/062

Abstract: A backlight module applicable to a key module is provided, the key module includes a plurality of key units and a baseplate, and the plurality of key units are disposed on the baseplate. The backlight module includes a lower substrate, a plurality of periphery light sources disposed along the peripheral of the baseplate, and a shielding structure. The lower substrate is disposed below the baseplate, and there is an outer edge gap between an outer edge of the baseplate and the lower substrate. The periphery light sources are disposed between the baseplate and the lower substrate. The shielding structure is disposed outside those periphery light sources distributed, to prevent light provided by the plurality of light sources from being emitted out of the outer edge gap.

公开(公告)号：US20230197366A1

公开(公告)日：2023-06-22

申请号：US18081712

申请日：2022-12-15

Applicant: DARFON ELECTRONICS CORP.

Inventor： Chen Yang ,  Ling-Hsi Chao ,  Shao-Lun Hsiao ,  Yu-Chun Hsieh

IPC: H01H3/12 ,  H01H13/14 ,  H01H13/70

CPC classification number: H01H3/125 ,  H01H13/14 ,  H01H13/70 ,  H01H2233/07

Abstract: A keyswitch structure includes a keycap support mechanism and a keycap that is supported by the keycap support mechanism in a vertical direction. The keycap support mechanism includes a base and two supports. The base has two sliding slots. Each sliding slot has an opening in a horizontal direction and an obstruction block at the opening. The horizontal direction is perpendicular to the vertical direction. Each support has a sliding portion and a linkage portion. The sliding portions slide parallel to the horizontal direction in the sliding slots correspondingly. The obstruction block prevents the corresponding sliding portion from disengaging from the corresponding sliding slot. The two linkage portions push against each other in line contact, so that the two supports are mutually driven through the two linkage portions.

公开(公告)号：US11621454B2

公开(公告)日：2023-04-04

申请号：US17169599

申请日：2021-02-08

Applicant: Darfon Electronics Corp.

Inventor： Chih-Hsien Liu

IPC: H01M50/244 ,  H01M50/264

Abstract: A battery assembly includes a battery holding unit and a battery unit removably held by the battery holding unit. The battery unit includes a battery, a first engaging portion and a second engaging portion disposed on an end portion of the battery. The battery holding unit includes a holding member selectively engaging with the first engaging portion or the second engaging portion to hold the battery unit at a first position or a second position. When the holding member and the first engaging portion relatively move away from each other, the battery unit moves from the first position to the second position at which the holding member engages with the second engaging portion, and the second engaging portion is allowed to rotate along a surface of the end portion to disengage from the holding member and to remove the battery unit from the battery holding unit.