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公开(公告)号：US20240118480A1
公开(公告)日：2024-04-11
申请号：US18510799
申请日：2023-11-16
发明人： Chao-Yu Chen
CPC分类号： G02B6/006 , G02B6/0068 , H01H13/023 , H01H13/14
摘要： A backlight keyswitch includes a board, a backlight module and a keyswitch body having a cap with a symbol formed thereon. The backlight module disposed under the cap includes first and second ink layers, a light guide plate, a light-blocking sheet having a transparent region corresponding to the cap, and a backlight circuit board having first, third, and second lighting units disposed in the light guide plate and arranged sequentially along a longitudinal direction for emitting first, third, and second color lights respectively to be incident to the transparent region after light mixing. The first and second ink layers are formed on the light-blocking sheet and located outside the first and second lighting units. Colors of the first and second ink layers at least correspond to colors of the second and first color lights respectively to achieve a mixed color.
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公开(公告)号：US20240094457A1
公开(公告)日：2024-03-21
申请号：US18368538
申请日：2023-09-14
发明人： Chao-Yu Chen
CPC分类号： G02B6/0043 , G02B6/0091 , H01H13/023 , H01H13/14
摘要： A backlight keyswitch includes a keycap, a support plate, a membrane circuit board and a backlight module. The support plate is disposed under the keycap. The membrane circuit board is disposed in parallel to the keycap and the support plate. The backlight module is disposed under the support plate, which includes a shielding sheet, a light guide panel, a lighting board and a protrusion structure. The shielding sheet includes a light permeable area corresponding to the keycap. The light guide panel is disposed under the shielding sheet. The lighting board is disposed under the light guide panel and includes a light source. The protrusion structure protrudes toward the light source and is formed on one of the support plate, the membrane circuit board and the shielding sheet. The protrusion structure reflects at least partial light of the light source to enter the light guide panel for lateral transmission.
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公开(公告)号：US20230358944A1
公开(公告)日：2023-11-09
申请号：US18221367
申请日：2023-07-12
发明人： Ying-Lan Liu , Hsin-Cheng Ho , Heng-Yi Huang , Chao-Yu Chen
CPC分类号： G02B6/0055 , G02B6/009 , G06F3/0202
摘要： 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.
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公开(公告)号：US20230305214A1
公开(公告)日：2023-09-28
申请号：US18128261
申请日：2023-03-30
发明人： Chao-Yu Chen , Heng-Yi Huang , Hsin-Cheng Ho
IPC分类号： F21V8/00 , H01H13/83 , H01H13/704
CPC分类号： G02B6/0031 , H01H13/83 , G02B6/0021 , H01H13/704 , G02B6/006 , H01H2219/044 , H01H2219/039
摘要： 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.
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公开(公告)号：US11520101B2
公开(公告)日：2022-12-06
申请号：US17585714
申请日：2022-01-27
发明人： Chao-Yu Chen
IPC分类号： H01H13/83 , F21V8/00 , H01H13/705 , G06F3/02
摘要： A luminous keyboard and an optical module thereof are provided. The optical module includes a light guide sheet, a reflective film on one side of the light guide sheet, and an optical film on another side of the light guide sheet opposite to the reflective film. The optical film has a mask pattern. The mask pattern defines a light-transparent region, a light-shielding region, and a light modulation region extending from the light-shielding region to the light-transparent region. The light-transparent region allows light to pass therethrough. The light-shielding region blocks light. The light modulation region partially allows light to pass therethrough and partially blocks light, so that an average light-transmitting rate per unit area of the light modulation region is smaller than that of the light-transparent region and larger than that of the light-shielding region.
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公开(公告)号：US20240118476A1
公开(公告)日：2024-04-11
申请号：US18368021
申请日：2023-09-14
发明人： Chao-Yu Chen
CPC分类号： G02B6/0021 , G02B6/005 , G02B6/0068 , G06F3/0202
摘要： A backlight keyswitch includes a backlight module and a keyswitch body having a cap with a symbol. The backlight module disposed under the cap includes a light guide plate, a light-blocking sheet, a backlight circuit board having first, third, and second lighting units disposed in the light guide plate and arranged sequentially along a longitudinal direction for emitting first, third, and second color lights respectively, and a micro optical layer. The light-blocking sheet is located above the backlight circuit board and has a transparent region. The light guide plate is located between the light-blocking sheet and the backlight circuit board. The micro optical layer is parallel to the light guide plate and formed corresponding to the transparent region to guide the first, second, and third color lights to the symbol and has first and second clearance regions respectively adjacent to the first and second lighting units in the longitudinal direction.
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公开(公告)号：US11914185B1
公开(公告)日：2024-02-27
申请号：US18235897
申请日：2023-08-21
发明人： Chao-Yu Chen
CPC分类号： G02B6/006 , G02B6/0068 , H01H13/023 , H01H13/14
摘要： A backlight keyswitch includes a cap with a symbol, and a backlight module under the cap and having first and second light modifying layers, a light guide plate, a light-blocking sheet having a transparent region corresponding to the cap, and first, third, and second lighting units arranged sequentially along a longitudinal direction for emitting first, third, and second color lights. The first and second light modifying layers might be ink layers formed on the light-blocking sheet and located outside the first and second lighting units, with colors of the first and second ink layers at least corresponding to colors of the second and first color lights respectively to achieve a mixed color. Alternatively, the first and second light modifying layers might be adhesive layers arrange parallel to the light guide plate, the first and second adhesive layers scattering a respective one of the first and second color light.
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公开(公告)号：US20220199339A1
公开(公告)日：2022-06-23
申请号：US17543696
申请日：2021-12-06
发明人： Chao-Yu Chen
摘要： A backlight keyboard includes a keyswitch assembly, a base and a light guide plate. The keyswitch assembly and the base are suitable for several language keyboards. A first keyswitch and a second keyswitch of a first keyswitch assembly correspond to a third keyswitch of a second keyswitch assembly. A first base and a second base respectively have at least one hole. The light guide plate has a light guide substrate and a light extracting portion. Union of the holes is set as a difference region on the light guide substrate. The light extracting portion is disposed on the difference region and used to guide light through the corresponding hole toward the corresponding keyswitch when the light guide substrate is disposed under the specific base.
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公开(公告)号：US20240096567A1
公开(公告)日：2024-03-21
申请号：US18369217
申请日：2023-09-18
发明人： Chao-Yu Chen , Po-Yueh Chou
IPC分类号： H01H13/83
CPC分类号： H01H13/83 , H01H2219/056 , H01H2219/06 , H01H2219/062 , H01H2219/064
摘要： A backlight module for illuminating a keycap includes a shielding sheet, a light guide panel, a lighting board disposed under the light guide panel, and a first protrusion structure. The shielding sheet includes a light permeable area. The light guide panel is disposed under the shielding sheet and has a light guide hole for accommodating a light source of the lighting board. The first protrusion structure is formed on the shielding sheet and protrudes toward the light source. The first protrusion structure is at least partially not overlapped with the light source in a vertical direction, for reflecting and scattering at least partial light of the light source to enter the light guide panel for lateral transmission.
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公开(公告)号：US11830688B2
公开(公告)日：2023-11-28
申请号：US17699594
申请日：2022-03-21
发明人： Hsin-Hung Liu , Chao-Yu Chen
CPC分类号： H01H13/83 , G02B6/0035 , G06F3/021 , H01H2219/062
摘要： 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.
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