Television – Basic receiver with additional function – Multimode
Reexamination Certificate
1998-01-14
2001-03-20
Black, Thomas G. (Department: 2171)
Television
Basic receiver with additional function
Multimode
C348S554000, C345S156000
Reexamination Certificate
active
06204884
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a television (TV), and more particularly, to a TV which is usable as a monitor of a personal computer (PC), and a method thereof.
2. Description of the Related Art
To use a TV for watching NTSC (National Television System Committee) broadcasting as a monitor of a PC or to watch DBS (Direct Broadcasting Satellite) broadcasting, additional equipment is required.
Referring to
FIG. 1
, a DBS receiver
102
and a PC/NTSC converter
104
are additionally connected to a general TV
100
coupled to an NTSC receiving antenna
101
. Then the TV
100
can perform a general broadcasting receiving function, a DBS receiving function and a PC monitor function. That is, to watch the DBS broadcasting, the DBS receiver
102
is installed at the TV
100
to convert a satellite broadcasting signal into a signal suitable for NTSC RF (Radio Frequency) standard. The converted signal is applied to the TV
100
through its antenna input terminal
103
. Alternatively, a base band composite video signal generated from the DBS receiver
102
may be applied to the TV through its external input terminal. To perform the PC monitor function, there is needed the PC/NTSC converter
104
for converting a PC monitor signal received from a terminal
106
into an NTSC signal which can be displayed on the TV
100
. If the output of the PC/NTSC converter
104
is connected to the external input terminal of the TV
100
, the PC monitor signal can be displayed on the TV
100
.
However, even if the DBS receiver
102
for watching such DBS broadcasting is installed, a digital DBS signal is converted into an analog NTSC signal and analog signal processing is implemented. During such processes, the characteristic of the DBS signal may be deteriorated. Further, if the TV is used as the PC monitor, the resolution, 800×600 for example, of the output of the PC monitor is lowered to the resolution, 640×480 for example, of the NTSC system. Therefore, it is difficult to receive future HDTV (high definition TV) broadcasting.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a multisystem TV which can be used as a PC monitor and enable viewing of the NTSC broadcasting, DBS broadcasting and HDTV broadcasting.
Additional objects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
To achieve the above and other objects, there is provided a multisystem TV including an NTSC signal processor for separating an NTSC broadcasting signal into a luminance signal and a chrominance signal and generating double-scanned original color signals; a digital broadcasting signal processor for decoding a DBS (Direct Broadcasting Satellite) broadcasting receiving signal and an HD (High Definition) broadcasting receiving signal and converting a signal corresponding to a current viewing mode out of the decoded HD signal, the decoded DBS signal and an external HD signal into a display type; a switching circuit for selectively generating one of a PC monitor signal received from a PC, an output signal of the digital broadcasting signal processor and an output signal of the NTSC signal processor according to the current viewing mode; a video output circuit for adjusting picture quality of a signal generated from the switching circuit so as to be supplied to a picture tube; a controller for controlling the signal processing of the NTSC signal processor, digital broadcasting signal processor and video output circuit, the switching of the switching circuit, and the deflection of the picture tube, according to the current viewing mode; and a synchronous processor for processing a synchronizing signal generated from the switching circuit and supplying the processed signal to the video output circuit and the controller.
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Black Thomas G.
Le Uyen
Samsung Electronics Co,. Ltd.
Staas & Halsey , LLP
LandOfFree
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