EP0377334B2
Expired / Lapsed
EP
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Picture-in-picture systems
Assignee: Samsung Electronics Co Ltd
•
Filing: 1989-12-29
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Granted: 1998-07-29
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Expires: 2009-12-29
Abstract
No abstract record available.
Inventors
- 👤 Jae-Chun Yu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 17:40
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/445; H04N5/45; H04N21/00; H04N21/40; H04N21/41; H04N21/426; H04N21/42607; H04N21/4263; H04N21/43; H04N21/431; H04N21/4312; H04N21/4316; H04N21/44; H04N21/4402; H04N21/440263; H04N21/47; H04N21/482; H04N21/80; H04N21/81; H04N21/8146; H04N21/8153
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
274 words
A video display system comprising: a microcomputer (10) for controlling the system; a pre-amplifier (17) for receiving and amplifying a remote
control signal and outputting the amplified signal
to the microcomputer (10) to control functions thereof; first and second tuners (15,16) for tuning desired channels; first and second input selectors (12,13) for receiving
signals from said first and second tuners (15,16) and
selecting image signals under the control of the microcomputer
(10); a luminance/colour (Y/C) unit (14) and
picture-in-picture (PIP) unit ((11) for receiving signals
from said input selectors (12,13) and generating
respectively a main screen and a plurality of
sub-screens; an on-screen display (OSD) unit (18) for displaying
channel numbers of channels that are available for
broadcasting but not necessarily currently displayed;
and a mixer (19) for mixing a PIP screen from the PIP unit
(11) with an OSD screen from the OSD unit (18), to display
simultaneously on the same screen a plurality of
sub-screens together with a visual display of a channel
number; wherein said microcomputer (10) is arranged to change
the channel of a selected one of the sub-screens to a
user selected one of said channel numbers displayed by
the OSD unit (18), said microcomputer (10) being arranged to receive a ROTATE
signal and, in response thereto, cause an image
from the channel of a selected one of the channel numbers
to be displayed in the currently selected
sub-screen, such that, in response to successive ROTATE
signals, images from different channels corresponding to
different selected ones of said channel numbers may be
displayed successively in different ones of said
sub-screens, with said sub-screens then displaying said
different images simultaneously.
Claim 2
Dependent Claim
56 words
A system according to claim 1, wherein the OSD unit (18) is arranged to display simultaneously the channel
numbers of a plurality of different channels that are available for broadcasting, and the microcomputer
(10) is arranged to display one of said channel numbers in such a manner as to distinguish it from the
other channel numbers.
Claim 3
Independent Claim
29 words
A system according to daim 2, wherein said microcomputer (10) is arranged to display said one of said
channel numbers by causing said channel number to flash or flicker.
Claim 4
Independent Claim
40 words
A system according to daim 2 or 3, wherein said microcomputer (10) is arranged to receive a channel
UP/DOWN signal and, in response thereto, cause said plurality of channel numbers and/or said one of
said channel numbers to be varied.
Claim 5
Independent Claim
26 words
A system according to any of the preceding claims, wherein a portion of said main screen is visible simultaneously
with said sub-screens, on the same screen.
Claim 6
Independent Claim
32 words
A system according to any of the preceding daims, wherein a line input (L) is provided to said input selectors
(12,13) in addition to signals from said first and second tuners (15,16).
Claim 7
Independent Claim
36 words
A system according to any of the preceding daims, wherein said microcomputer (10) is arranged to receive
a SCREEN PROGRAM signal and, in response thereto, cause said system to be in or out of PIP mode.
Claim 8
Independent Claim
34 words
A system according to any of the preceding claims, wherein said microcomputer (10) is arranged to display
at least one moving image and a plurality of still images in different ones of said sub-screens.
Claim 9
Independent Claim
29 words
A system according to any of the preceding daims, further comprising a visual display means for displaying
a visual image corresponding to a signal output from said mixer (19).
Claim 10
Dependent Claim
121 words
Use of a system according to any of the preceding daims to provide a visual display, by : (a) outputting rotation data from the microcomputer (10) to perform a strobe-stop, upon receipt of a
SCREEN PROGRAM signal; (b) checking whether a channel UP/DOWN signal is received by calling said on-screen-display in the
strobe-step condition, increasing a pointer value if said channel UP/DOWN signal is received, selecting
a presently displayed channel if said UP/DOWN signal is not received but said ROTATE signal is received,
and thereupon outputting the rotation data; and (c) clearing said on-screen-display if the SCREEN PROGRAM signal is received while the ROTATE
signal is not received at the step (b) and outputting strobe data to release the strobe-stop condition.
Claim 11
Dependent Claim
135 words
Use of a system to provide a visual display according to claim 10, wherein said on-screen-display is called
by the steps of: (i) outputting row and column address data and channel number data stored in a channel memory if
the on-screen-display is called, and checking whether said row address is the same as a last address;
and (ii) checking whether a display-on flag is set to "1" if said row address in step (i) is the same as the last
address, turning off a channel number on a row corresponding to a value of the sum of the pointer and
the row address if said display is in an ON-state, or otherwise turning on the channel number on said
row address corresponding to the value of the sum of the pointer and the row address.
Claim 12
Dependent Claim
121 words
Use of a system to provide a visual display according to claim 10 or 11, wherein said step (a) comprises
the sub-steps of: (a1) setting a screen mode flag to "1", checking whether said SCREEN PROGRAM signal is received,
and checking repeatedly whether said SCREEN PROGRAM signal is received until said SCREEN
PROGRAM signal is detected; (a2) checking whether a four picture-in-picture mode is set when the SCREEN PROGRAM signal is
received at step (a1), and outputting the rotation data to perform the strobe-stop mode if the four picture-in-picture
mode is set; and (a3) outputting corresponding four picture-in-picture data if the four picture-in-picture mode is not set
at step (a2), and thereupon outputting the rotation data to perform the strobe-stop mode.
Claim 13
Dependent Claim
106 words
Use of a system to provide a visual display according to claim 10, 11, or 12, wherein the step (b) comprises
the sub-steps of: (b1) calling the on-screen-display at the strobe-stop mode and checking whether the channel UP/DOWN
signal is received; (b2) increasing the pointer value if the channel UP/DOWN signal is received at the step (b1) and re-calling
the on-screen-display; and (b3) checking whether the ROTATE signal is received if the channel UPIDOWN signal is not received
at the step (b1), selecting a corresponding channel which is presently flickering if the ROTATE signal
is received, thereupon outputting the rotation data, and then re-calling the on-screen-display.
Claim 14
Dependent Claim
87 words
Use of a system to provide a visual display according to claim 10, 11, 12, or 13, wherein the step (c) comprises
the sub-steps of: (c1) checking whether the SCREEN PROGRAM signal is received if the ROTATE signal is not received,
and re-executing the step (b) if the SCREEN PROGRAM signal is not received; (c2) dearing the on-screen-display if the SCREEN PROGRAM signal is received at the sub-step (c1);
and (c3) outputting the strobe data to release the strobe-stop mode and setting the screen mode to "zero".
References Cited (Backward Citations)
No citation records indexed.
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