公开(公告)号：US20240112870A1

公开(公告)日：2024-04-04

申请号：US18374073

申请日：2023-09-28

Applicant: Darfon Electronics Corp.

Inventor： Yen-Chang CHEN ,  Heng-Yi HUANG

IPC: H01H13/83 ,  F21V8/00

CPC classification number: H01H13/83 ,  G02B6/0043 ,  G02B6/0055 ,  H01H2219/04

Abstract: A backlight module for a lighting keyboard comprises a lighting board including light emitting units, a light guide panel disposed on the lighting board and including light guide holes, and a shielding sheet disposed on the light guide panel. Each light emitting unit is located in each light guide hole. The backlight module is divided into regions including a middle region and two first side regions located outside the middle region. The light guide holes include at least one middle light guide hole in the middle region and at least one first light guide hole in the first side region. A distance between a light emitting unit located in the middle light guide hole and a wall of the middle light guide hole is lesser than a distance between a light emitting unit located in the first light guide hole and a wall of the first light guide hole.

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.