公开(公告)号：US20240361509A1

公开(公告)日：2024-10-31

申请号：US18767973

申请日：2024-07-09

Applicant: DARFON ELECTRONICS CORP.

Inventor： Chun-Tan Wu ,  Heng-Yi Huang

IPC: F21V8/00 ,  G06F3/02

CPC classification number: G02B6/0031 ,  G02B6/002 ,  G06F3/0202

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 plate hole for accommodating the light emitting unit. The lighting board has at least one 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 at least one pair of pads. Each of the at least one 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. At least one lighting area is located between the at least one pair of pads.

公开(公告)号：US12253706B2

公开(公告)日：2025-03-18

申请号：US18767973

申请日：2024-07-09

Applicant: DARFON ELECTRONICS CORP.

Inventor： Chun-Tan Wu ,  Heng-Yi Huang

IPC: G06F3/02 ,  F21V8/00

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 plate hole for accommodating the light emitting unit. The lighting board has at least one 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 at least one pair of pads. Each of the at least one 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. At least one lighting area is located between the at least one pair of pads.

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.