US5235636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable telephone set housing having an illuminated switch panel
Assignee: Fujitsu Ltd
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Filing: 1991-08-07
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Granted: 1993-08-10
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Expires: 2011-08-07
Abstract
Abstract A portable telephone set housing having an illuminated switch portion. A flexible printed circuit board having a membrane switch and a liquid crystal display is mounted onto a support base of the telephone set housing. Onto the flexible printed circuit board is placed a key top sheet having a plurality of key tops. A switch panel having a plurality of holes for inserting therein of the key tops is mounted onto the key top sheet. The switch panel includes a transparent resin plate having an ink coating formed on the surface thereof except for a portion corresponding to the position of the display portion. In the membrane switch portion of the flexible printed circuit board, a plurality of light emitting diodes are provided which are adapted to introduce light into the interior of the switch panel.
Inventors
- 👤 Hisamitsu Takagi
- 👤 Masashi Tomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:51
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/7006; H04; H04M; H04M1/00; H04M1/02; H04M1/0202; H04M1/22; H01H2219/00; H01H2219/002; H01H2219/014; H01H2219/028; H01H2219/054; H01H2219/062; H01H2223/00; H01H2223/01; H01H2223/014; H01H2223/034; H01H2223/036; H01H2229/00; H01H2229/034; H01H2229/036; H01H2229/044; H01H2231/00; H01H2231/022; H01H2239/00; H01H2239/004
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
137 words
A portable telephone set housing comprising: a casing having a support base; a first flexible printed circuit board mounted on said support base of the case and having a membrane switch portion and a display portion; a key top sheet placed on said flexible printed circuit board and having a plurality of key tops; a switch panel mounted on said top sheet and having a plurality of holes for insertion therein of said key tops, said switch panel comprising a transparent resin plate having an ink coating formed on the entire surface thereof except for a portion of the surface corresponding to the position of said display portion, said switch panel being adapted to function as a light guide plate; and a plurality of light sources adapted to introduce light into the interior of said switch panel.
Claim 2
Dependent Claim
137 words
A portable telephone set housing comprising: a casing having a support base; a first flexible printed circuit board mounted on said support base of the case and having a membrane switch portion and a display portion; a key top sheet placed on said flexible printed circuit board and having a plurality of key tops; a switch panel mounted on said top sheet and having a plurality of holes for insertion therein of said key tops, said switch panel comprising a transparent resin plate having an ink coating formed on the entire surface thereof except for a portion of the surface corresponding to the position of said display portion, said switch panel being adapted to function as a light guide plate; and a plurality of light sources adapted to introduce light into the interior of said switch panel.
Claim 3
Dependent Claim
26 words
A portable telephone set housing according to claim 1, wherein said light sources are provided on said membrane switch portion of said flexible printed circuit board.
Claim 4
Dependent Claim
33 words
A portable telephone set housing according to claim 1, further including a second printed circuit board disposed within said case, and wherein said light sources are provided on said second printed circuit board.
Claim 5
Dependent Claim
58 words
A portable telephone set housing according to claim 1, further including a plurality of switch disks provided in said membrane switch portion of said flexible printed circuit board and a plurality of actuator means fixed to lower ends of said key tops of said key top sheet, said actuator means having bottom ends which contact said switch disks.
Claim 6
Dependent Claim
215 words
A portable telephone set housing comprising: a casing including a support base having a plurality of holes, with a metallic film being formed on an inner surface of said case; a flexible printed circuit board mounted on said support base of the case and having a membrane portion and a display portion, said flexible printed circuit board further having a plurality of holes in positions corresponding to positions of the holes of the case; a key top sheet placed on said flexible printed circuit board and having a plurality of key tops, said key top sheet having a plurality of holes in positions corresponding to positions of the holes of the case; and a switch panel including a plurality of openings for insertion therein of said key tops, a plurality of partition walls for partitioning said openings by groups, a plurality of projections formed respectively on said partition walls in positions corresponding to positions of the holes of the case, and a metallic film formed on end faces of said partition walls and said faces of said projections, said switch panel being mounted to said case with said projections inserted into the holes of the case through the holes formed in the key top sheet and the holes formed in said flexible printed circuit board.
Claim 7
Dependent Claim
215 words
A portable telephone set housing comprising: a casing including a support base having a plurality of holes, with a metallic film being formed on an inner surface of said case; a flexible printed circuit board mounted on said support base of the case and having a membrane portion and a display portion, said flexible printed circuit board further having a plurality of holes in positions corresponding to positions of the holes of the case; a key top sheet placed on said flexible printed circuit board and having a plurality of key tops, said key top sheet having a plurality of holes in positions corresponding to positions of the holes of the case; and a switch panel including a plurality of openings for insertion therein of said key tops, a plurality of partition walls for partitioning said openings by groups, a plurality of projections formed respectively on said partition walls in positions corresponding to positions of the holes of the case, and a metallic film formed on end faces of said partition walls and said faces of said projections, said switch panel being mounted to said case with said projections inserted into the holes of the case through the holes formed in the key top sheet and the holes formed in said flexible printed circuit board.
Claim 8
Dependent Claim
86 words
A portable telephone set housing according to claim 5, further including a plurality of light sources adapted to introduce light into the interior of said switch panel and provided on said membrane switch portion of said flexible printed circuit board, and wherein said switch panel is comprised of a transparent resin plate having an ink coating formed on the entire surface thereof except for a portion corresponding to the position of said display portion, said switch panel being adapted to function as a light guide plate.
Claim 9
Dependent Claim
58 words
A portable telephone set housing according to claim 5, further including a plurality of switch disks provided on said membrane switch portion of said flexible printed circuit board and a plurality of actuator means fixed to lower ends of said key tops of said key top sheet, said actuator means having bottom ends which contact said switch disks.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-08-09 | 1997-02-08 | 1997-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-09 | 2001-02-08 | 2001-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-09 | 2005-02-08 | 2005-08-10 | $7700.00 | Window Closed / Lapsed |