Philips | 13PT30L | EP 1 379 082 B1

Europäisches Patentamt
(19)
European Patent Office
*EP001379082B1*
Office européen des brevets
(11)
EP 1 379 082 B1
EUROPEAN PATENT SPECIFICATION
(12)
(45) Date of publication and mention
(51) Int Cl.7:
of the grant of the patent:
08.06.2005 Bulletin 2005/23
H04N 5/64
(21) Application number: 02077696.9
(22) Date of filing: 04.07.2002
(54) Display apparatus
Anzeigevorrichtung
Appareil d’affichage
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR
IE IT LI LU MC NL PT SE SK TR
(43) Date of publication of application:
07.01.2004 Bulletin 2004/02
(73) Proprietor: Koninklijke Philips Electronics N.V.
• Edwin Van Lier
Prof. Holstlaan 6, 5656 AA Eindhoven (NL)
• Ralph Hubert Peters
Prof. Holstlaan 6, 5656 AA Eindhoven (NL)
• Josephus Hubertus Eggen
Prof. Holstlaan 6, 5656 AA Eindhoven (NL)
• Rosendaal, Wilhelmus Joseph
5656 AA Eindhoven (NL)
5621 BA Eindhoven (NL)
(74) Representative: Steenbeek, Leonardus Johannes
(72) Inventors:
EP 1 379 082 B1
• Theodorus Franciscus Emilius Maria Overes
Prof. Holstlaan 6, 5656 AA Eindhoven (NL)
• Aeneas Fletterman
Prof. Holstlaan 6, 5656 AA Eindhoven (NL)
• Elmo Marcus Attila Diederiks
Prof. Holstlaan 6, 5656 AA Eindhoven (NL)
• Erwin Rinaldo Meinders
Prof. Holstlaan 6, 5656 AA Eindhoven (NL)
Philips
Intellectual Property & Standards
P.O. Box 220
5600 AE Eindhoven (NL)
(56) References cited:
DE-U- 20 002 420
US-A1- 2002 038 157
US-A- 5 408 387
Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give
notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in
a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art.
99(1) European Patent Convention).
Printed by Jouve, 75001 PARIS (FR)
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EP 1 379 082 B1
Description
[0001] The invention relates to a display apparatus
such as a television set, or a monitor, and to a method
of operating an entertainment center.
[0002] Recently, large screen displays have become
known that can be put on a wall like a painting. Such
displays may be (part of) a television set having a tuner,
or (part of) a monitor without a tuner. DE 200 02 420 U1
discloses a television set and a lamp. The brightness of
the lamp is controlled if the difference between the
brightness of the lamp and the brightness of images rendered on the screen of the television exceeds a threshold value. This reduces eye fatigue when watching television. US20020038157 discloses a plurality of LEDs,
which are controlled in response to an audio signal. US
6,166,496 discloses an illumination control signal, which
is encoded in a television signal. The illumination control
signal contains information on how to vary color and intensity of an illumination source. At the location of a television receiver and the illumination source, a decoder
separates the control signal from the television signal.
The decoded control signal controls the illumination
source.
[0003] It is, inter alia, an object of the invention to provide an improved display apparatus. To this end, the invention provides a display apparatus as defined in the
independent claims. Advantageous embodiments are
defined in the dependent claims. These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described
hereinafter. The attention of the reader is drawn to the
fact that aspects of the invention described herein are
covered by co-pending applications.
[0004] In the drawings,
Fig. 1 shows an embodiment of a display apparatus
in accordance with the present invention;
Fig. 2 shows a block diagram of a first embodiment
of a control circuit for use in a display apparatus in
accordance with the present invention;
Fig. 3 shows a block diagram of a second embodiment of a control circuit for use in a display apparatus in accordance with the present invention; and
Fig. 4 shows a block diagram of a third embodiment
of a control circuit for use in a display apparatus in
accordance with the present invention.
[0005] Fig. 1 shows an embodiment of a display apparatus in accordance with the present invention. The
display apparatus is preferably mounted on a wall in a
room. In accordance with the present invention, the display apparatus has illumination units for providing a
background light at left-hand and right-hand sides of the
display apparatus, preferably mounted at the back of the
display apparatus. In an alternative embodiment, the illumination units are mounted at the left-hand and righthand sides of the display apparatus. In yet other alter-
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native embodiments, (some of) the illumination units are
directed to the viewer. As a result of the invention, the
display apparatus, preferably a display apparatus having a wide-screen display unit, has a much larger impact
on those present in the room, even when no video signal
is displayed. Alternatively or in addition thereto, the display apparatus may have an illumination unit on top and/
or bottom sides of the display apparatus, again mounted
at the back of the display apparatus.
[0006] It is noted that Philips produces a low-end TV
(13PT30L) with lighted legs, which are just ornamental,
and do nothing to improve the impact on the viewer.
Moreover, it has been proven that watching TV in an illuminated surrounding is less tiring than watching TV in
a dark room. This is because the surrounding light
equalizes the difference between the different amount
of screen light output. Clearly, the prior art lighted legs
do not provide the advantage of the inventive illumination unit providing a background light having a controllable color. Moreover, Philips once produced a TV with
an incandescent bulb inside, which equally does not
provide the advantages of the present invention.
[0007] The illumination unit may create a neutral white
background light. However, in accordance with an advantageous embodiment of the invention, the illumination unit may produce colored light, the color and brightness of which can be controlled so as to optimally fit in
with the room and the wishes of the user. For example,
the color could be tuned into a warmer color or a colder
color. To this end, the embodiment shown in Fig. 2 has
a control unit CU that produces red, green and blue control signals RCS, GCS, BCS that control red, green and
blue LED illumination cells R, G, B mounted at the back
side of the display apparatus, preferably in a sub-assembly in cooling units at the top and the bottom ends
of light guides mounted along the left-hand and righthand sides of the display apparatus. The control unit CU
receives a user control signal UCS (that may be produced by a remote control signal reception device) to
set the color in such a manner that it fits in with the room.
While the illumination unit preferably employs LEDs,
other light sources may be used in alternative embodiments. The control unit may receive a signal from a light
sensor so as to make the light from the illumination unit
dependent on ambient light as well.
[0008] In accordance with a further advantageous
embodiment, the color of the light produced by the illumination unit depends on an average color of the video
signal displayed on the display unit. To that end, the display apparatus includes a control circuit as shown in Fig.
3 for controlling the illumination unit in dependence of a
video content of a video signal displayed on the display
unit. This control circuit comprises a processor P, such
as a suitably programmed microprocessor, that receives
the input video signal VS and that produces an average
color signal CAV in dependence thereon. The average
color signal CAV is sent to the control unit CU that produces the red, green and blue control signals RCS,
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EP 1 379 082 B1
GCS, BCS that control the red, green and blue LED illumination cells R, G, B mounted at the back side of the
display apparatus. By doing so, the LED illumination
cells R, G, B are able to produce any color that matches
the average color of the video signal VS. So, when an
underwater scene is displayed, the illumination unit produces a blue-greenish light, while when a more reddish
scene is shown, the illumination unit also produces a
reddish color. As a result, the viewed scene will have a
far greater impact on a viewer than the same scene
when viewed on a prior art display apparatus. In a similar
manner, the brightness of the light from the illumination
units may depend on the brightness of the video signal.
[0009] In an advantageous embodiment, the color of
the left-hand illumination unit depends on an average
color at a left-hand part of a picture displayed on the
display screen, while the color of the right-hand illumination unit depends on an average color of a right-hand
part of the displayed picture.
[0010] In accordance with a still further embodiment,
the control circuit controls the illumination unit in dependence of an audio signal. In this manner, the display
apparatus can be used as a light organ that advantageously uses the controllable illumination unit present
in the display apparatus in accordance with the present
invention. The embodiment of Fig. 4 matches that of Fig.
3, with the difference that instead of the video signal VS,
an audio signal AS is applied to the processor P. Preferably, the audio signal corresponds to the video signal.
In this manner, when a video clip of a pop artist is displayed, the illumination unit functions as a light organ
that depends on the audio signal of the pop song sung
by the pop artist.
[0011] In summary, in an advantageous embodiment,
the screen is provided with a lighting system that lights
up against the background. This ambient lighting is builtin in the rear side of the screen and can be controlled
by the remote control of the TV set. The ambient lighting
causes a comfortable way of watching TV because it
equals the light relation between the screen and the surroundings. By way of the ambient lighting, an effect is
created like the TV is floating in front of the wall. It can
also be used in case of not watching TV, than it functions
like as decorative element in the room. The invention
provides the following ergonomic advantages. In a dark
room with a TV, the TV is the only source of light. When
watching TV, one is fixated on that only source of light.
The intensity of the light changing very fast when the
image in the screen changes. The eye has to adapt to
changing of the amount of light. The eye will become
tired after a wile watching TV in a dark room. In a room
with enough ambient light this problem does not appear
because the difference in light production is not the only
source of light that penetrates into the eye. Adding an
ambient /background lighting will reduce the problem of
watching TV with to little amount of light in the room.
[0012] It should be noted that the above-mentioned
embodiments illustrate rather than limit the invention,
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and that those skilled in the art will be able to design
many alternative embodiments without departing from
the scope of the appended claims. For example, the various embodiments shown in the drawings may be combined, so that a user selects whether the color produced
by the illumination unit is fixed at a set color, whether
and how the color depends on the video signal VS, and/
or whether and how the color depends on the audio signal AS. The color of the light from the illumination units
may depend on a signal that is transmitted with the video
signal, such as a teletext signal. For example, such an
additional signal could indicate relatively darker colors
for a heavy metal band, while relatively brighter colors
are indicated for pop music intended for a younger audience. The invention is advantageously used in an entertainment center. The invention is not limited to TV
screens hanging on the wall. In the claims, any reference signs placed between parentheses shall not be
construed as limiting the claim. The word "comprising"
does not exclude the presence of elements or steps other than those listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a
plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed
computer. In the device claim enumerating several
means, several of these means can be embodied by one
and the same item of hardware. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these
measures cannot be used to advantage.
Claims
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1.
A display apparatus, comprising:
a display unit for displaying a picture;
at least one illumination unit (R, G, B) for providing a background light; and
means (CU) for controlling color of the background light in response to an average color of
the picture at a side where the background light
is present.
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2.
The display apparatus of claim 1, wherein the controlling means (CU) comprise a control circuit for
controlling brightness and color of the background
light.
3.
The display apparatus of claim 2, further comprising
a light sensor for sensing ambient light, the control
circuit being adapted for controlling the brightness
and color in response to the ambient light.
4.
The display apparatus of claim 1, wherein the at
least one illumination unit (R, G, B) comprises a lefthand illumination unit for providing illumination de-
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EP 1 379 082 B1
leuchtung abhängig von einem mittleren Farbton
des linken Teils des Bildes aufweist und eine rechte
Beleuchtungseinheit zum Liefern von Beleuchtung
abhängig von einem mittleren Farbton eines rechten Teils des Bildes.
pending on an average color of a left-hand part of
the picture, and a right-hand illumination unit for
providing illumination depending on an average
color of a right-hand part of the picture.
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5.
The display apparatus of claim 1, wherein the at
least one illumination unit (R, G, B) is mounted on
a top and/or a bottom side of the display apparatus.
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5.
Wiedergabeanordnung nach Anspruch 1, wobei die
wenigstens eine Beleuchtungseinheit (R, G, B) auf
einer oberen und/oder einer unteren Seite der Wiedergabeanordnung vorgesehen ist.
6.
Wiedergabeanordnung nach Anspruch 1, wobei die
wenigstens eine Beleuchtungseinheit (R, G, B) auf
einer Rückseite der Wiedergabeanordnung vorgesehen ist.
7.
Wiedergabeanordnung nach Anspruch 1, vorgesehen zur Wandmontage.
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8.
Wiedergabeanordnung nach Anspruch 1, wobei die
Beleuchtungseinheit (R, G, B) rote, grüne und blaue
LEDs ausweist, die an einem Lichtleiter angeordnet
sind.
10. A method of operating an entertainment center, the
method being characterized by using a display apparatus as claimed in claim 1.
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9.
Wiedergabeanordnung nach Anspruch 2, wobei die
Steuerung des Farbtons des Hintergrundlichtes
von Benutzer einstellbar ist.
Patentansprüche
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6.
7.
The display apparatus of claim 1, wherein the at
least one illumination unit (R, G, B) is mounted at a
backside of the display apparatus.
The display apparatus of claim 1, being adapted for
wall mounting.
8.
The display apparatus of claim 1, wherein the illumination unit (R, G, B) comprises red, green and
blue LEDs mounted at a light guide.
9.
The display apparatus of claim 2, wherein the controlling of the color of the background light is user
adjustable.
1.
eine Wiedergabeeinheit zum Wiedergeben eines Bildes,
wenigstens eine Beleuchtungseinheit (R, G, B)
zum Liefern einer Hintergrundbeleuchtung;
und
Mittel (CU) zur Steuerung des Hintergrundlichtes in Reaktion auf eine mittlere Farbe des Bildes an der Seite, wo es das Hintergrundlicht
gibt.
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Wiedergabeanordnung nach Anspruch 1, wobei die
Steuermittel (CU) eine Steuerschaltung aufweisen
zur Steuerung der Helligkeit des Hintergrundlichtes.
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Wiedergabeanordnung nach Anspruch 2, weiterhin
mit einem Lichtsensor zum Abtasten des Umgebungslichtes, wobei die Steuerschaltung dazu vorgesehen ist, die Helligkeit und den Farbton in Reaktion des Umgebungslichtes zu steuern.
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-
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3.
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Wiedergabeanordnung, das die nachfolgenden
Elemente umfasst:
-
2.
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10. Verfahren zum Betreiben eines Unterhaltungszentrums, wobei das Verfahren dadurch gekennzeichnet ist, dass eine Wiedergabeanordnung
nach Anspruch 1 verwendet wird.
Revendications
1.
une unité d'affichage pour afficher une image;
au moins une unité d'illumination (R, G, B) pour
fournir un éclairage de fond; et
des moyens (CU) pour commander la couleur
de l'éclairage de fond en réaction à une couleur
moyenne de l'image à un côté où l'éclairage de
fond est présent.
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2.
Dispositif d'affichage selon la revendication 1, dans
lequel les moyens de commande (CU) comprennent un circuit de commande pour commander la
luminosité et la couleur de l'éclairage de fond.
3.
Dispositif d'affichage selon la revendication 2, comprenant encore un détecteur de lumière pour détecter de la lumière ambiante, le circuit de commande
étant adapté à commander la luminosité et la couleur en réaction à la lumière ambiante.
4.
Dispositif d'affichage selon la revendication 1, dans
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4.
Wiedergabeanordnung nach Anspruch 1, wobei die
wenigstens eine Beleuchtungseinheit (R, G, B) eine
linke Beleuchtungseinheit zum Liefern von Be-
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Dispositif d'affichage comprenant:
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EP 1 379 082 B1
lequel la au moins une unité d'illumination (R, G, B)
comprend une unité d'illumination gauche pour
fournir une illumination dépendant d'une couleur
moyenne d'une partie gauche de l'image et une unité d'illumination droite pour fournir une illumination
dépendant d'une couleur moyenne d'une partie
droite de l'image.
5.
6.
7.
8.
9.
Dispositif d'affichage selon la revendication 1, dans
lequel la au moins une unité d'illumination (R, G, B)
est montée sur un côté supérieur et/ou inférieur du
dispositif d'affichage.
Dispositif d'affichage selon la revendication 1, dans
lequel la au moins une unité d'illumination (R, G, B)
est montée d'un côté arrière du dispositif d'affichage.
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Dispositif d'affichage selon la revendication 1 qui
est adapté à être monté à une paroi.
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Dispositif d'affichage selon la revendication 1, dans
lequel l'unité d'illumination (R, G, B) comprend des
diodes électroluminescentes rouges, vertes et
bleues qui sont montées à un guide de lumière.
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Dispositif d'affichage selon la revendication 2, dans
lequel la commande de la couleur de l'éclairage de
fond est réglable par l'utilisateur.
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10. Procédé d'opération d'un centre de divertissement,
le procédé étant caractérisé par l'utilisation d'un
dispositif d'affichage selon la revendication 1.
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