US 2024/0201430 A1 · BACKLIT MODULE AND ILLUMINATED KEYSWITCH STRUCTURE

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.

Claims20

Dependent claims

An illuminated keyswitch structure, comprising:

a baseplate having at least one bridge rib configured to define at least one peripheral hole;
a mask film disposed below the baseplate to allow partial light output;
a light guide sheet disposed on one side of the mask film opposite to the baseplate, the light guide sheet having a plurality of light-exit portions disposed corresponding to the at least one peripheral hole and at least one non-light-exit portion corresponding to the at least one bridge rib;
a reflective layer disposed on one side of the light guide sheet opposite to the mask film, the reflective layer provided with microstructures,
wherein in a stacked direction of the baseplate, the mask film, the light guide sheet, and the reflective layer, a first portion of of the microstructures are disposed on the reflective layer to overlap the at least one non-light-exit portion of the light guide plate and overlap the at least one bridge rib of the baseplate.

2 more elements

A backlit module adapted for a keyswitch, comprising:

a mask film allowing partial light output to the keyswitch;
a light guide sheet disposed on one side of the mask film, the light guide sheet having a light source hole and a plurality of light-exit portions, the plurality of light-exit portions disposed corresponding to the keyswitch;
a reflective layer disposed on one side of the light guide sheet opposite to the mask film;
and
a light-emitting element accommodated in the light source hole of the light guide sheet;
wherein a through hole is defined close to the keyswitch and penetrates along a stacked direction through the mask film, the light guide sheet and the reflective layer, and the backlit module further comprises at least one of a through-hole top glue disposed above the light guide sheet and a through-hole bottom glue disposed under the light guide sheet;
wherein a peripheral coating portion exposed from at least one of the mask film and the reflective layer is defined surrounding the through hole to substantially block light, and in the stacked direction the peripheral coating portion overlaps with at least one of the through-hole top glue and the through-hole bottom glue.

4 more elements

Dependencies are inferred from the claim text.

Backlit module and illuminated keyswitch structure

Life of this patent

Backlit module and illuminated keyswitch structure

Life of this patent

Abstract

Claims20