公开(公告)号：US20250136774A1

公开(公告)日：2025-05-01

申请号：US18826560

申请日：2024-09-06

Applicant: DARFON ELECTRONICS CORP.

Inventor： Li-Sheng TENG ,  Shih-Kai CHEN

IPC: C08J7/04 ,  C08J5/12 ,  C08J7/046

Abstract: A hot pressing membrane includes a carrier film, a decorative layer formed on the carrier film, and a transparent protective layer formed on the decorative layer. The decorative layer includes, in parts by weight, 4.0 to 6.0 parts by weight of a first thermoplastic polyurethane, 1.0 to 2.0 parts by weight of a pigment, and 12.0 to 15.0 parts by weight of a first solvent. The transparent protective layer includes, in parts by weight, 4.0 to 6.0 parts by weight of a second thermoplastic polyurethane, 0.6 to 2.0 parts by weight of a functional additive, and 11.0 to 14.0 parts by weight of a second solvent. The hot pressing membrane of the invention is via the carrier film bonded to an outer surface of an object by a hot pressing process. The hot pressing membrane of the invention has a scratch resistance equal to or greater than 50 times.

公开(公告)号：US12272504B2

公开(公告)日：2025-04-08

申请号：US17821814

申请日：2022-08-24

Applicant: Darfon Electronics Corp.

Inventor： Chih-Yao Chi ,  Ling-Hsi Chao ,  Da-Shan Hsu ,  Shao-Lun Hsiao ,  Yu-Chun Hsieh

IPC: H01H13/14 ,  H01H13/20 ,  G06F3/02 ,  G06F3/0354

Abstract: A keyswitch assembly includes a base, a pressable plate, a first magnetic acting member and a second magnetic acting member. An accommodating space is defined within the base, and an upper surface of the base is provided with a connecting portion. The pressable plate includes a pressing portion, an acting portion and a pivotal connection portion located between the pressing portion and the acting portion and pivotally connected to the connecting portion. The first magnetic acting member is disposed on the acting portion; the second magnetic acting member is disposed on the base corresponding to the first magnetic acting member. The keyswitch assembly is configured such that the first magnetic acting member and the second magnetic acting are attracted or repulsed each other by a magnetic force, so as to provide or change a pressing resistance of the pressing portion.

公开(公告)号：US20250112007A1

公开(公告)日：2025-04-03

申请号：US18896982

申请日：2024-09-26

Applicant: DARFON ELECTRONICS CORP.

Inventor： Po-Wei Tsai ,  Hsun-Kun Peng ,  Po-Min Huang

IPC: H01H13/14 ,  H01H3/12

Abstract: A keycap support mechanism increases the stability of supporting a keycap through structure designs of supports. Two supports are pivotally connected around a pivot axis; therein, at least one of the supports includes a support body and a reinforcement part embedded into the support body. The elastic modulus of the reinforcement part is greater than the elastic modulus of the support body. In an embodiment, the reinforcement part has a surrounding portion. The surrounding portion surrounds three sides of a pivot hole of the support. In another embodiment, the two supports both have a reinforcement part. The two reinforcement parts have overlapping portions in a vertical direction. A keyswitch structure includes a base plate, a keycap, and any of the above keycap support mechanisms. The keycap support mechanism supports the keycap above the base plate.

公开(公告)号：US20250102720A1

公开(公告)日：2025-03-27

申请号：US18899071

申请日：2024-09-27

Applicant: Darfon Electronics Corp.

Inventor： Yuchuan Ku

IPC: F21V8/00 ,  G06F3/0354

Abstract: A backlit module includes a light guide member and a light source. The light guide member includes a body having a first side and a second side opposite to each other, a light input surface disposed on the first side of the body, a light output surface disposed at an end of the body opposite to the light input surface, and a curved surface disposed on the second side of the body and corresponding to the light input surface, wherein a vertical projection of the light input surface overlaps the curved surface, and the light source is disposed corresponding to the light input surface and the curved surface.

公开(公告)号：US20240429005A1

公开(公告)日：2024-12-26

申请号：US18746069

申请日：2024-06-18

Applicant: Darfon Electronics Corp.

Inventor： Chao-Yu Chen ,  Hsin-Cheng Ho

IPC: H01H13/83 ,  G06F3/02

Abstract: A touch lighting keyswitch can be changed to a touch lighting function key bar includes a circuit board, a first sheltering component, a first light guiding component, a second sheltering component and a second light guiding component. The circuit board has a first light unit and a second light unit respectively emitting a first illumination beam and a second illumination beam. The first sheltering component has a character hole. The first light guiding component is disposed between the circuit board and the first sheltering component and adapted to guide the first illumination beam passing through the character hole. The second sheltering component is disposed above the first sheltering component, and has an opening relevant to the character hole. The second light guiding component is disposed between the first sheltering component and the second sheltering component and adapted to guide the second illumination beam passing through the opening.

公开(公告)号：US20240404770A1

公开(公告)日：2024-12-05

申请号：US18657796

申请日：2024-05-08

Applicant: DARFON ELECTRONICS CORP.

Inventor： Po-Wei Tsai

IPC: H01H13/70

Abstract: A plastic board suitable for a keyboard having first and second keyswitch sets includes first and second board portions and transverse dividing slots. The first and second board portions have first and second mounting areas respectively corresponding to the first and second keyswitch sets. First dividing slots of the first board portion extend sequentially along a periphery of at least one first mounting area to separate first and second board regions. Second dividing slots of the second board portion extend sequentially along a periphery of at least one second mounting area to separate third and fourth board regions. The transverse dividing slots are formed separately between the first and second board portions to separate the first and third board regions and separate the second and fourth board regions. The first, second, third, and fourth board regions have a feeding point, respectively, to be formed by an injection molding process.

公开(公告)号：US20240379308A1

公开(公告)日：2024-11-14

申请号：US18644074

申请日：2024-04-23

Applicant: Darfon Electronics Corp.

Inventor： Chih-Hung Chien ,  Chih-Chung Yen

IPC: H01H13/7073 ,  H01H13/02

Abstract: A backlight keyswitch includes a keyswitch body, a membrane circuit board disposed under the keyswitch body, a backlight module and an elastic body having a bridge structure, a central pillar, and a ring-shaped base disposed on the membrane circuit board. The keyswitch body has a keycap with a symbol. The backlight module is disposed under the membrane circuit board for emitting light to the symbol. The elastic body is disposed between the keycap and the membrane circuit board for returning the keycap to its original position. The bridge structure extends from the ring-shaped base toward the keycap to connect to the central pillar for supporting the central pillar, such that the central pillar is suspended relative to the membrane circuit board and abuts against the keycap. A projection of the central pillar on the keycap completely covers the symbol.

公开(公告)号：US20240379303A1

公开(公告)日：2024-11-14

申请号：US18780572

申请日：2024-07-23

Applicant: Darfon Electronics Corp.

Inventor： Yen-Chang CHEN ,  Po-Yueh CHOU

IPC: H01H13/02 ,  G06F3/02

Abstract: A backlight module for a lighting keyboard including at least two heat-dissipating keys comprises a reflective layer, a light guide panel and a shielding sheet and has at least two penetration channels. The reflective layer, the light guide panel and the shielding sheet are stacked up and down. The penetration channels symmetrically correspond to the heat-dissipating keys respectively and penetrate the reflective layer, the light guide panel and the shielding sheet. The penetration channels are respectively provided with one light-reducing pattern at their periphery for blocking light. At least two diffusion patterns are arranged adjacent to the light-reducing patterns for guiding light to illuminate the heat-dissipating keys. The light-reducing patterns and the diffusion patterns form at least two heat-reducing optical pattern groups respectively. The heat-reducing optical pattern groups respectively corresponding to the heat-dissipating keys have identical patterns.

公开(公告)号：US20240274379A1

公开(公告)日：2024-08-15

申请号：US18398285

申请日：2023-12-28

Applicant: Darfon Electronics Corp.

Inventor： Yen-Chang CHEN ,  Po-Yueh CHOU

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

CPC classification number: H01H13/023 ,  G02B6/0035 ,  G02B6/0085 ,  G06F3/0202 ,  H01H2219/056 ,  H01H2219/06 ,  H01H2219/062

Abstract: A backlight module for a lighting keyboard including at least two heat-dissipating keys comprises a reflective layer, a light guide panel and a shielding sheet and has at least two penetration channels. The reflective layer, the light guide panel and the shielding sheet are stacked up and down. The penetration channels symmetrically correspond to the heat-dissipating keys respectively and penetrate the reflective layer, the light guide panel and the shielding sheet. The penetration channels are respectively provided with one light-reducing pattern at their periphery for blocking light. At least two diffusion patterns are arranged adjacent to the light-reducing patterns for guiding light to illuminate the heat-dissipating keys. The light-reducing patterns and the diffusion patterns form at least two heat-reducing optical pattern groups respectively. The heat-reducing optical pattern groups respectively corresponding to the heat-dissipating keys have identical patterns.

公开(公告)号：US20240186080A1

公开(公告)日：2024-06-06

申请号：US18443626

申请日：2024-02-16

Applicant: Darfon Electronics Corp.

Inventor： Heng-Yi HUANG ,  Yen-Chang CHEN

IPC: H01H13/83

CPC classification number: H01H13/83 ,  H01H2221/0702

Abstract: An illuminated keyswitch structure and an illuminating module thereof are provided. The illuminating module includes a drive circuit board having a reflector layer disposed thereon, a light-emitting part disposed on the drive circuit board and proximate to the reflector layer, a covering structure having an island-shaped covering portion, and a spacer adhered between the covering structure and the drive circuit board and having a through hole and an adhesive-less clearance fringe at least partially surrounding the through hole, wherein the island-shaped covering portion covers above the light-emitting part and the through hole.