公开(公告)号：US11881363B2

公开(公告)日：2024-01-23

申请号：US18297020

申请日：2023-04-07

Applicant: DARFON ELECTRONICS CORP.

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

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

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

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 hole for accommodating the light emitting unit. The lighting board has a 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 pair of pads. Each of the 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.

公开(公告)号：US20230375773A1

公开(公告)日：2023-11-23

申请号：US18131886

申请日：2023-04-07

Applicant: DARFON ELECTRONICS CORP.

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

IPC: F21V8/00 ,  H01H13/02 ,  H01H13/83

CPC classification number: G02B6/006 ,  G02B6/0036 ,  H01H13/023 ,  H01H13/83

Abstract: A lighting keyboard includes a backlight module and two rows of keyswitches. The backlight module includes a lighting board and a shielding sheet. The lighting board includes plural illuminants aligned into two rows to correspond to the two rows of keyswitches. The shielding sheet includes plural first outlet windows and plural first block patterns disposed within the first outlet windows respectively and form a first row pattern collectively. Each of the first block patterns respectively corresponds to one of the illuminant. The shielding sheet includes at least one second outlet window and plural second block patterns respectively disposed within the at least one second outlet window and formed a second row pattern collectively. Each of the plural second block patterns respectively correspond to one of the plural illuminants. A first window length of the entire contour of the plural first outlet windows is as long as a second window length of the at least one second outlet window. And the first row pattern is not identical to the second row pattern, thereby providing consistent contour halos for the two rows of keyswitches.

公开(公告)号：US20230358944A1

公开(公告)日：2023-11-09

申请号：US18221367

申请日：2023-07-12

Applicant: DARFON ELECTRONICS CORP.

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

IPC: F21V8/00 ,  G06F3/02

CPC classification number: G02B6/0055 ,  G02B6/009 ,  G06F3/0202

Abstract: A backlight module includes a lighting board, a light guide panel, a shielding sheet, and a protrusion structure. The lighting board includes two non-intersected traces, a plurality of microstructure regions and at least one illuminant unit. The illuminant unit is connected between the microstructure regions. The microstructure regions do not overlap with the two non-intersected traces. The light guide panel is disposed above the lighting board, and the shielding sheet is disposed above the light guide panel. The protrusion structure is formed on the shielding sheet, protrudes towards the lighting board, and is between the microstructure regions. The protrusion structure diffuses light of the illuminant unit at an early section of its light path to enter into the light guide panel for lateral transmission. The plural microstructure regions reflect and recycle the light at a following section of the light path to jointly enhance the uniformity of illuminating a keycap.

公开(公告)号：US20230343525A1

公开(公告)日：2023-10-26

申请号：US18297020

申请日：2023-04-07

Applicant: DARFON ELECTRONICS CORP.

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

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

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

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 hole for accommodating the light emitting unit. The lighting board has a 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 pair of pads. Each of the 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.

公开(公告)号：US20230305214A1

公开(公告)日：2023-09-28

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: F21V8/00 ,  H01H13/83 ,  H01H13/704

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

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：US20230207236A1

公开(公告)日：2023-06-29

申请号：US18179420

申请日：2023-03-07

Applicant: Darfon Electronics Corp.

Inventor： Hsin-Hung LIU ,  Chao-Yu CHEN ,  Heng-Yi Huang ,  Hsin-Cheng Ho

IPC: H01H13/83 ,  G06F3/02 ,  F21V8/00

CPC classification number: H01H13/83 ,  G06F3/021 ,  G02B6/0035 ,  H01H2219/062

Abstract: A backlight module applicable to a key module is provided, the key module includes a plurality of key units and a baseplate, and the plurality of key units are disposed on the baseplate. The backlight module includes a lower substrate, a plurality of periphery light sources disposed along the peripheral of the baseplate, and a shielding structure. The lower substrate is disposed below the baseplate, and there is an outer edge gap between an outer edge of the baseplate and the lower substrate. The periphery light sources are disposed between the baseplate and the lower substrate. The shielding structure is disposed outside those periphery light sources distributed, to prevent light provided by the plurality of light sources from being emitted out of the outer edge gap.

公开(公告)号：US20250166941A1

公开(公告)日：2025-05-22

申请号：US18942760

申请日：2024-11-10

Applicant: DARFON ELECTRONICS CORP.

Inventor： Hsin-Hung Liu ,  Wen-Ming Hsu ,  Heng-Yi Huang

IPC: H01H13/02 ,  H01H13/04 ,  H01H13/10 ,  H01H13/7057

Abstract: A lighting keyboard includes a plurality of keys and a backlight module. Each of the keys has a keycap. The backlight module is located below the keys. The backlight module includes a plurality of light emitting units and a light guide plate. Three of the light emitting units are arranged in a triangle to form a light emitting area. The light emitting area overlaps with at least two keycaps. The light guide plate is provided with two relatively sparser microstructure regions and at least one relatively denser microstructure region on a connection line of at least two of the three light emitting units. The two relatively sparser microstructure regions are respectively close to the at least two light emitting units. The at least one relatively denser microstructure region is located between the two relatively sparser microstructure regions.

公开(公告)号：US12293883B2

公开(公告)日：2025-05-06

申请号：US18128240

申请日：2023-03-30

Applicant: DARFON ELECTRONICS CORP.

Inventor： Heng-Yi Huang

IPC: H01H13/83

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. The first reflecting ink layer is formed on the light-blocking sheet and located above the backlight circuit board, for at least partially reflecting light emitted by the backlight circuit board back to an optical microstructure in the light guide plate to prevent center symbols of the keyswitch body from being too bright, such that light can be incident to the keyswitch body via scattering of the optical microstructure to increase brightness of side symbols of the keyswitch body.

公开(公告)号：US11977250B2

公开(公告)日：2024-05-07

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：US11587743B2

公开(公告)日：2023-02-21

申请号：US17510597

申请日：2021-10-26

Applicant: DARFON ELECTRONICS CORP.

Inventor： Heng-Yi Huang ,  Hsin-Cheng Ho

IPC: H01H13/702 ,  G06F1/16 ,  H01H13/83 ,  G06F3/02

Abstract: A backlight apparatus includes a light-guiding plate, a light-shielding membrane, a light-reflecting sheet, a plurality of first translucent glue bodies, and a plurality of second translucent glue bodies. The light-guiding plate has a plurality of through holes. Each of the first translucent glue bodies corresponds to one of the through holes. Each first translucent glue body is placed on a front surface of the light-guiding plate, and surrounds a respective circumference of the corresponding through hole to bond the light-shielding membrane thereabove and the light-guiding plate therebelow. Each first translucent glue body has a respective breach. Each of the second translucent glue bodies corresponds to one of the first translucent glue bodies, is placed via at least one portion thereof in the breach of the corresponding first translucent glue body, and bonds the light-shielding membrane thereabove and the light-guiding plate therebelow.