公开(公告)号：US20250130649A1

公开(公告)日：2025-04-24

申请号：US18764404

申请日：2024-07-05

Applicant: DARFON ELECTRONICS CORP.

Inventor： Heng-Yi Huang ,  Chun-Tan Wu

IPC: G06F3/02 ,  G06V40/13

Abstract: An illuminated touch key uses a chamfer structure of a light guide panel disposed on a sensing module or a light guide panel adjacent to a sensing module to guide light emitted by a light source to a hollow area of a keycap to emit light, thereby forming an illuminated pattern corresponding to the hollow area. Accordingly, a user can accurately find the location of the illuminated touch key according to the illuminated pattern. Since there is no need to add a light guide structure above the sensing module, the height of the illuminated touch key will not be increased, such that it is conductive to make the illuminated touch key thinner.

公开(公告)号：US12259112B2

公开(公告)日：2025-03-25

申请号：US17897211

申请日：2022-08-28

Applicant: DARFON ELECTRONICS CORP.

Inventor： Hsin-Cheng Ho ,  Heng-Yi Huang ,  Yi-Tung Lo

IPC: G06F1/16 ,  F21V19/00 ,  H05K1/11 ,  F21Y115/10 ,  G06F3/02

Abstract: An illuminating circuit structure includes a film sheet, an illuminant, a printed baseline layer, and a printed pad layer. The printed baseline layer includes a first baseline segment and a second baseline segment printed on the film sheet, while the printed pad layer includes a first bar pad and a second bar pad. For a first baseline head of the first baseline layer and a first pad head of the first bar pad, one of which extends along a first direction and the other of which extends along a second direction not parallel to the first direction. Therefore, the first baseline segment and the first bar pad achieve electrical connection despite of an existed print shifting. Similarly, a second baseline head of the second baseline layer and a second pad head of the second bar pad also can achieve electrical connection despite of an existed print shifting.

公开(公告)号：US20240230982A9

公开(公告)日：2024-07-11

申请号：US18376818

申请日：2023-10-04

Applicant: DARFON ELECTRONICS CORP.

Inventor： Chao-Yu Chen ,  Heng-Yi Huang

IPC: F21V8/00 ,  H01H13/02

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.

公开(公告)号：US12019261B2

公开(公告)日：2024-06-25

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: H01H13/83 ,  F21V8/00 ,  H01H13/704

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

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：US20240177950A1

公开(公告)日：2024-05-30

申请号：US18431561

申请日：2024-02-02

Applicant: DARFON ELECTRONICS CORP.

Inventor： Heng-Yi Huang ,  Hsin-Cheng Ho ,  Po-Yueh Chou

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

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

Abstract: A lighting keyboard is provided with at least one keyswitch, a support plate and a backlight module. The keyswitch has a keycap and a switch under the keycap. The support plate connects beneath the keycap by a support mechanism. The backlight module has a lighting board configured underneath the support plate and corresponding to the keycap. The lighting board includes a board, a first reflective layer and a circuit layer. The circuit layer is disposed on the board and includes a concave-convex structure and circuit traces. The circuit traces electrically connects with a light emitting unit. The first reflective layer covers the concave-convex structure to form microstructure regions.

公开(公告)号：US11947150B2

公开(公告)日：2024-04-02

申请号：US18192848

申请日：2023-03-30

Applicant: Darfon Electronics Corp.

Inventor： Heng-Yi Huang ,  Hsin-Cheng Ho ,  Po-Yueh Chou

IPC: F21V8/00 ,  H01H13/705 ,  H01H13/83

CPC classification number: G02B6/0035 ,  G02B6/0055 ,  H01H13/705 ,  H01H13/83 ,  G02B6/006 ,  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 configured to substantially reflect a light, a light guide sheet disposed at one side of the mask film and having a light source hole, a reflective layer disposed at one side of the light guide sheet opposite to the mask film and having an opening communicating with the light source hole, a top glue configured to connect the mask film and the light guide sheet around the light source hole, and a bottom glue configured to connect the light guide sheet and the reflective layer around the light source hole. The first coating covers the light source hole. In a stacked direction of the mask film, the light guide sheet, and the reflective layer, at least one of the top glue and the bottom glue overlaps the first coating.

公开(公告)号：US20230360869A1

公开(公告)日：2023-11-09

申请号：US18221371

申请日：2023-07-12

Applicant: DARFON ELECTRONICS CORP.

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

IPC: H01H13/83 ,  H01H13/705

CPC classification number: H01H13/83 ,  H01H13/705 ,  H01H2219/04 ,  H01H2219/056 ,  H01H2219/06

Abstract: A backlight module is configured to illuminate at least one keycap. The backlight module includes a shielding sheet, a lighting board and a protrusion structure. The lighting board includes an illuminant unit and a pair of footprints respectively connecting the illuminant unit. Each of the footprints includes at least one hollow area, and the at least one hollow area overlaps at least a portion of the illuminant unit. The protrusion structure is formed at the shielding sheet. The protrusion structure protrudes towards the light board and at least partially overlaps the pair of footprints, so that the backlight module diffuses light of the illuminant between the protrusion structure and the footprints.

公开(公告)号：US20230317386A1

公开(公告)日：2023-10-05

申请号：US18128240

申请日：2023-03-30

Applicant: DARFON ELECTRONICS CORP.

Inventor： Heng-Yi Huang

IPC: H01H13/83

CPC classification number: H01H13/83 ,  H01H2219/06 ,  H01H2219/064 ,  H01H2219/062

Abstract: A backlight keyswitch includes a keyswitch body, a board connected to the keyswitch body, a backlight module and a membrane disposed between the keyswitch body and the board. The backlight module is disposed under the board and includes a backlight circuit board, a light-blocking sheet, a first reflecting ink layer, and a light guide plate disposed between the light-blocking sheet and the backlight circuit board having a backlight source disposed in a containing hole of the light guide plate. The first reflecting ink layer is formed on the board, the membrane, or the light-blocking sheet and located above the backlight source, for at least partially reflecting light emitted by the backlight source back to an optical microstructure in the light guide plate, such that light can pass through the light-blocking sheet, the board and the membrane sequentially via scattering of the optical microstructure to be incident to the keyswitch body.

公开(公告)号：US20230314691A1

公开(公告)日：2023-10-05

申请号：US18128235

申请日：2023-03-30

Applicant: DARFON ELECTRONICS CORP.

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

IPC: F21V8/00

CPC classification number: G02B6/0051

Abstract: A lighting keyboard includes a backlight module and at least one keyswitch. The backlight module includes a lighting substrate and a protruding structure. The lighting substrate includes two non-intersecting traces and a light emitting unit. The light emitting unit is connected between the two non-intersecting traces. A position of the protruding structure corresponds to a position of the light emitting unit and the protruding structure is located between the two non-intersecting traces. The at least one keyswitch is disposed on the backlight module.

公开(公告)号：US11728110B2

公开(公告)日：2023-08-15

申请号：US17847853

申请日：2022-06-23

Applicant: Darfon Electronics Corp.

Inventor： Heng-Yi Huang ,  Hsin-Cheng Ho

IPC: H01H13/83

CPC classification number: H01H13/83 ,  H01H2221/0702

Abstract: An illuminated keyswitch structure is provided. A base plate includes plural openings and plural rib portions separating the openings. A drive circuit board is disposed under the base plate. A spacer having a through hole is disposed underneath the base plate and above the drive circuit board. A light-emitting part with low illuminance is disposed on the drive circuit board and in the through hole, and the light-emitting part vertically corresponding to one of the openings of the base plate. A light-permeable covering structure includes a first covering layer and a second covering layer. The second covering layer vertically corresponds to the light-emitting part and said corresponding opening of the base plate. The second covering layer blocks at least partial light of the light-emitting part toward said corresponding opening to reduce illuminating intensity provided there through.