Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1999-02-09
2004-03-09
Tran, Thai (Department: 2615)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000, C386S349000
Reexamination Certificate
active
06704495
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to audio-video playback device that at east reproduces images and sounds recorded in a recording and reproducing medium such as a disk type recording and reproducing medium (hereinafter referred to as disk), and a tape type recording and playback medium or the like. The images are reproduced by a liquid crystal display (LCD) monitor, speakers and a headphone.
BACKGROUND OF THE INVENTION
In recent years, various types of audio-video playback device that reproduce images and sounds recorded in a disk such as a video compact disk (Video-CD), digital versatile disk (DVD) or the like are proposed. In the recent trend of reducing weight and size of electronic device, much attention has been paid to compact type disks for personal use.
Hereinafter a conventional audio-video playback device is described referring to illustrations.
FIG. 16
shows an example of a conventional audio-video playback device. In
FIG. 16
, an device body
101
has a shape of sideways long rectangular parallelepiped, and has a disk cover
101
l
at the center part of the top side
101
U. A disk (not illustrated) is set under the cover
101
l
by opening the cover
101
l
. Operation switches
101
c
are disposed on the front side
101
F and the top side
101
U of the device body
101
for the operation such as playback, stop and the like of the disk. Speakers
101
s
are disposed on the top side
101
U at both left and right sides of the disk cover
101
l
, for outputting playback sounds of the disk in stereo, to which a plurality of persons can listen at the same time.
The left side
101
L and the right side
101
R of the device body
101
have a roundish curved surface. On the left side
101
L, a headphone terminal
101
h
is disposed. Through a headphone (not illustrated) connected to the terminal
101
h
, the user of the device can enjoy playback sounds of the disk alone because the sound output from the speakers
101
s
are cut when the headphone is connected to the terminal
101
h
. On the right side
101
R, a power source terminal
101
p
is disposed. To the terminal
101
p
, an AC adapter (not illustrated) for connection to home use electricity or a DC adapter (not illustrated) for connection to car battery is connected for supplying electric power to the audio-video playback device. On the back side
101
B, an audio signal output terminal
101
a
and a video signal output terminal
101
v
are disposed for outputting the respective signals for an external stereo amplifier (not illustrated) and for an external TV monitor (not illustrated). At around the four corners of the bottom side
101
S, rubber legs
101
g
are solidly attached by an adhesive (one of the legs is shown in FIG.
16
). A monitor portion
102
has a rectangular parallelepiped shape of the size smaller than the projected plane area of the device body
101
. The monitor portion
102
is rotatably supported by rotatably supporting portions
103
disposed at the back end, close to the back side
101
B, of the top side
101
U, and opens or closes over the top side
101
U of the device body
101
. At the center part of the display side
102
I of the monitor portion
102
, a liquid crystal display unit (hereinafter referred to as LCD)
102
m
is disposed for displaying playback images of the disk.
The conventional audio-video playback device having the above structure is set on a study desk, a dining table or a flat portion beyond driver's sight of a car dashboard (hereinafter referred to as desk for these) in the manner that the bottom side
101
S faces downward, then the electric power is supplied through the power source terminal
101
p
of the right side
101
R. By operating the operation switches
101
c
, many people can watch the playback images and listen to the playback sounds at the same time. When a user wants to enjoy playback sounds alone, it can be done by connecting a headphone to the headphone terminal
101
h
because the sounds do not come out from the speakers when the headphone is connected to the terminal. The connection cord of the headphone often extends from the left side of a headphone, accordingly the headphone can be neatly connected by the cord to the device having a headphone terminal at the left side
101
L.
However, there are the following problems in the structure of conventional audio-video playback device. The left and the right sides of the device body have a curved shape and have terminals respectively, and, the size of the device body and that of the monitor portion are different from each other. Therefore, stable side-down setting of the device in the manner that the right or the left side of the device faces downward is difficult, i.e., the device can only be set stably in the manner that the bottom side of the device body faces downward. Therefore, a user laying himself or herself in the manner that his or her head is laid as illustrated in
FIG. 17
cannot watch playback images in a directionally natural state. Also, since the speakers are disposed on the device body in stead of the monitor portion, a user cannot face to the speakers even in ordinary setting of the device. Therefore sufficient sound characteristics cannot be obtained, and thus, when the user lies down, he hears the sounds from the upper and the lower side of the device, accordingly the stereo effect cannot be obtained.
SUMMARY OF THE INVENTION
An audio-video playback device of the present invention comprises an device body having a left and a right sides reproduces an audio and a video signals recorded in a recording and playback medium, and outputs the reproduced signals, a monitor portion having a left and a right sides, display means disposed on the main surface of the monitor portion, for displaying an image according to a video signal inputted from the device body, and rotatably supporting portions disposed on the device body and having rotation axis for rotatably supporting the monitor portion, wherein, a plane formed by a first side out of the left and the right sides of the device body and a plane formed by a second side, located at the same side with the first side, out of the left and the right sides of the monitor portion, form a substantially same plane, and the substantially same plane is substantially vertical to the rotation axis of the rotatably supporting portions, and the gravity center of the device body locates between a center line and the first side, wherein the center line locates in the center between the left side and the right side of the device body.
In the above structure, the first side of the device body and the second side, which locates at the same side with the first side, of the monitor portion are substantially on the same plane that is substantially vertical to the rotation axis, and, the gravity center of the device body locates toward the first side of the device body. Accordingly, the very stable setting of the device in the manner that the first side of the device body faces downward in the state that the monitor portion is opened by rotating the monitor portion on the rotation axis (hereinafter referred to as side-down setting) is realized. The side-down setting is as stable as the setting of device in the manner that the bottom side of the device faces downward (hereinafter referred to as ordinary setting). Accordingly, an audio-video playback device, in which a user can watch images displayed on the display area in the state that the device is set in the manner that either of the bottom side or the first side faces downward, can be obtained.
The audio-video playback device of the present invention has no operation switches and no input/output terminals on the first side of the device body and the second side of the monitor portion, and has a structure that the gravity center of the device body locates toward the first side of the device body.
In this structure, terminals such as power source terminal, headphone terminal and the like and switches such as power source switch, playback operation switches and the like are not disposed on the
Fujimoto Yoshihiro
Hamano Ko
Kumazawa Takaaki
Maeoka Tadashi
Nakagawa Takamichi
Onuaku Christopher
RatnerPrestia
Tran Thai
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