Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
1999-04-19
2001-05-01
Hunter, Daniel (Department: 2684)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S095000, C455S575100
Reexamination Certificate
active
06226535
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a cellular telephone, and more particularly, to a cellular telephone with an improved LCD supporting frame.
2. Description of the Prior Art
Typically, the LCD panel of a cellular telephone is supported horizontally above the main circuit board by a supporting frame. An auxiliary circuit board with a light source is installed vertically at one end of the supporting frame and a light guiding panel is installed horizontally on the supporting frame for passing light emitted from the light source upward onto the LCD panel as backlight. The auxiliary circuit board is soldered onto the main circuit board thus fixing it to the supporting frame and allowing inward passage of current. The contacting surface and soldering area of the auxiliary circuit board and main circuit is small and there is no room to install any circuits other than a simple light source circuit. The soldering area is further limited during installation of the supporting frame and auxiliary circuit board onto the main circuit board due to the complexity of the cellular telephone. Installing the supporting frame and auxiliary circuit board is not an easy task.
SUMMARY OF THE INVENTION
It is therefore a primary objective of the present invention to provide a cellular telephone with an auxiliary circuit board having a light source and a peripheral circuit to solve the mentioned problem.
In a preferred embodiment, the present invention provides a cellular telephone comprising:
a housing;
a main circuit board horizontally installed in the housing and comprising a first surface connector having a plurality of metal conductors installed on an upper surface of the main circuit board;
an LCD (liquid crystal display) panel installed above the main circuit board for displaying images;
a supporting frame latched to the main circuit board for supporting the LCD panel above the upper surface of the main circuit board;
an auxiliary circuit board vertically installed at one end of the supporting frame having a light source, a peripheral circuit, and a second surface connector in it, the second surface connector comprising a plurality of metal conductors corresponding to the metal conductors of the first surface connector, the second surface connector being electrically wired to the light source and the peripheral circuit on the auxiliary circuit board;
a light guiding panel horizontally mounted between the LCD panel and the supporting frame for passing light emitted from the light source upward onto the LCD panel so as to provide backlight to the LCD panel; and
an elongated zebra connector horizontally mounted to a bottom side of the supporting frame and comprising a bottom side and an elongated vertical side.
It is an advantage of the present invention that the cellular telephone according to the present invention solves the soldering problem by facilitating the combination of components. At the same time, it reduces the number of components and simplifies the general structure of the cellular telephone.
This and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after having read the following detailed description of the preferred embodiment which is illustrated in the various figures and drawings.
REFERENCES:
patent: 4642627 (1987-02-01), Hodson et al.
patent: 5204805 (1993-04-01), Takahashi et al.
patent: 5410141 (1995-04-01), Koeck et al.
patent: 5517683 (1996-05-01), Collett et al.
patent: 5711013 (1998-01-01), Collett et al.
patent: 5867795 (1999-02-01), Novis et al.
patent: 5966647 (1999-10-01), Sawai
patent: 6006118 (1999-12-01), Stephenson
Acer Peripherals. Inc.
Hsu Winston
Hunter Daniel
Nguyen Thuan T.
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