Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Reexamination Certificate
2000-11-28
2003-07-01
Shalwala, Bipin (Department: 2673)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
C345S173000, C345S174000, C345S104000, C204S403060
Reexamination Certificate
active
06587097
ABSTRACT:
FIELD
The present invention relates to display system. More specifically, the present invention relates to a touch screen. More particularly, the present invention relates to a connector for electrically coupling layers of a touch screen.
BACKGROUND
A touch screen is generally known. Such touch screen is typically used in front of a computer-driven display that is capable of displaying variable images, or a non-variable display that is capable of providing fixed images. Such touch screen may “sense” or recognize the existence and location of a “touch” on its exterior surface so that a user can input commands to an accessory (e.g., a general purpose computer). A touch screen may be resistive or capacitive, analog or matrix.
In a resistive touch screen, during an input event or “touch” an electrically conductive flexible layer is deformed, bent or pressed across a gap to contact an electrically conductive stable layer. When the flexible layer contacts the stable layer, the touch from an input element or device (e.g., finger or stylus) can be “sensed.” When the flexible layer of a matrix touch screen is pressed, a discrete switch is closed and two electrically conductive coatings (e.g., a transparent coating patterned in rows on one surface of the flexible layer and patterned in columns orthogonal to the rows on the opposing surface of the stable layer) are brought into electrical contact. The discrete switch is associated with a particular row and column. A computer or other electronic circuit can be used to provide electric signals to the rows and columns and determine the horizontal and vertical position (X, Y coordinate) associated with the closed discrete switch.
However, a problem with such touch screen is that the material that physically and electrically attaches the flexible layer to the stable layer (i.e., cured epoxy having a conductor) is hard and rigid and may crack or obtain fissures due to temperature and humidity changes. Other disadvantages of such epoxy include: storage of the epoxy at a cold temperature of about −40° C., since such epoxy typically has a pot life or useful life of about six hours at room temperature, which may result in unused or unusable epoxy material; warming of the epoxy before use; curing of the epoxy at a high temperature of about 87° C., which may require curing equipment (e.g., an oven), time (e.g., about one-hundred and twenty minutes), and which may affect other materials of the touch screen (e.g., shrinkage/expansion of the stable and flex layers).
Accordingly, there is a need for a touch screen conductor to couple the flexible layer to the stable layer that may be stored at ambient temperature. There is also a need for a touch screen fastener that may be semi-rigid. There is also a need for a low cost connector that may be easily applied in a touch screen application. There is also a need for a touch screen connector that may be applied at room temperature. Thus, it would be advantageous to provide a touch screen having features that fulfill one or more of these needs. These and other features will become apparent to one of skill who reviews this disclosure and appended claims.
SUMMARY
The present invention relates to a display system. The display system may include a display panel for display of information. The display system may also include a touch screen coupled to the display panel. The touch screen may include a base layer physically coupled to a cover layer. The touch screen may also include a semi-rigid conductor for electrically coupling the base layer to the cover layer. The conductor may be generally dispensable at about room temperature.
The present invention also relates to a touch screen including a semi-rigid conductor for electrically coupling a base to a cover.
The present invention also relates to a touch screen. The touch screen may include a first means for providing an electrically conductive material. The touch screen may also include a second means for providing an electrically conductive material. The touch screen may also include a connector for electrically coupling the first means to the second means. The connector may be generally dispensable at about room temperature.
The present invention also relates to a method of manufacturing a touch screen. The method may include providing a first layer having a first relatively translucent surface. The method may also include providing a second layer having a second relatively translucent surface. The method may also include dispensing a conductor on at least one of the first surface and the second surface thereby electrically coupling the first surface to the second surface. The conductor may have a viscosity of at least about 5,000 centipoise at 0.3 RPM at about room temperature. The conductor may also have flexibility sufficient to compensate at least partially for relative movement of the first layer and the second layer due to environmental changes.
REFERENCES:
patent: 3915548 (1975-10-01), Opittek et al.
patent: 4017848 (1977-04-01), Tannas, Jr.
patent: 4292461 (1981-09-01), Hovel
patent: 4342879 (1982-08-01), Catalano et al.
patent: 4410968 (1983-10-01), Frohbach et al.
patent: 4419533 (1983-12-01), Czubatyj et al.
patent: 4422721 (1983-12-01), Hahn et al.
patent: 4495514 (1985-01-01), Lawrence et al.
patent: 4497974 (1985-02-01), Deckman et al.
patent: 4498225 (1985-02-01), Gutierrez et al.
patent: 4508609 (1985-04-01), Moustakas et al.
patent: 4509997 (1985-04-01), Cockayne et al.
patent: 4534622 (1985-08-01), Harada et al.
patent: 4543958 (1985-10-01), Cartmell
patent: 4554727 (1985-11-01), Deckman et al.
patent: 4572958 (1986-02-01), Durand et al.
patent: 4585310 (1986-04-01), Clecak et al.
patent: 4587171 (1986-05-01), Hamano et al.
patent: 4591189 (1986-05-01), Holmen et al.
patent: 4598164 (1986-07-01), Tiedje et al.
patent: 4644221 (1987-02-01), Gutierrez et al.
patent: 4653860 (1987-03-01), Hendrix
patent: 4672014 (1987-06-01), Joiner et al.
patent: 4677250 (1987-06-01), Barnett et al.
patent: 4747674 (1988-05-01), Butterfield et al.
patent: 4782222 (1988-11-01), Ragle et al.
patent: 4786767 (1988-11-01), Kuhlman
patent: 4799770 (1989-01-01), Kahn et al.
patent: 4825081 (1989-04-01), Willie et al.
patent: 4838656 (1989-06-01), Stoddard
patent: 4846551 (1989-07-01), Rancourt et al.
patent: 4870322 (1989-09-01), Matsudaira et al.
patent: 4882183 (1989-11-01), Ino et al.
patent: 4899204 (1990-02-01), Rosen et al.
patent: 4940495 (1990-07-01), Weber et al.
patent: 4963788 (1990-10-01), King et al.
patent: 4970376 (1990-11-01), Mellor et al.
patent: 4990286 (1991-02-01), Gordon
patent: 5056895 (1991-10-01), Kahn
patent: 5073219 (1991-12-01), McArdle et al.
patent: 5076674 (1991-12-01), Lynam
patent: 5078803 (1992-01-01), Pier et al.
patent: 5162783 (1992-11-01), Moreno
patent: 5193668 (1993-03-01), Fukuchi et al.
patent: 5218417 (1993-06-01), Gay et al.
patent: 5233459 (1993-08-01), Bozler et al.
patent: 5239406 (1993-08-01), Lynam
patent: 5270858 (1993-12-01), Dickey
patent: 5280570 (1994-01-01), Jordan
patent: 5323024 (1994-06-01), Adams
patent: 5335098 (1994-08-01), Leyva et al.
patent: 5351255 (1994-09-01), Schetzina
patent: 5355245 (1994-10-01), Lynam
patent: 5368309 (1994-11-01), Monroe et al.
patent: 5384653 (1995-01-01), Benson et al.
patent: 5399978 (1995-03-01), De Kort et al.
patent: 5407733 (1995-04-01), Bjornard et al.
patent: 5417791 (1995-05-01), Beeteson et al.
patent: 5421589 (1995-06-01), Monroe
patent: 5421982 (1995-06-01), Ikeda et al.
patent: 5428226 (1995-06-01), Adams
patent: 5451724 (1995-09-01), Nakazawa et al.
patent: 5477088 (1995-12-01), Rockett et al.
patent: 5489369 (1996-02-01), Bjornard et al.
patent: 5494833 (1996-02-01), Martin et al.
patent: 5495833 (1996-03-01), Ishizaka et al.
patent: 5508091 (1996-04-01), Austin
patent: 5521035 (1996-05-01), Wolk et al.
patent: 5523877 (1996-06-01), Lynam
patent: 5528071 (1996-06-01), Russell et al.
patent: 5530581 (1996-06-01), Cogan
patent: 5541438 (1996-07-01), Martin et al.
patent: 5541770 (1996-07-01), Pellicori et al.
patent: 5578141 (1996-11-01), Mori et al.
patent:
Aufderheide Brian E.
Linsmeyer Louis R.
Spang Joseph C.
3M Innovative Properties Co.
Dhria Prabodh
Pechman Robert J.
Shalwala Bipin
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