JPH0577894U - Lighting equipment - Google Patents

Abstract

(57) [Summary] [Purpose] The lighting in the theater space is changed according to the brightness of the screen to enhance the sense of presence. [Structure] Illumination of a theater space surrounding a screen of a television receiver 2 is changed by a lighting control device 4 according to the brightness of an image displayed on the screen. By controlling the illuminance of the environment surrounding the screen in a direction that enhances the sensation of reality, such as lowering the illuminance on a dark screen, the environment corresponding to the video content in the play is created and the viewer is drawn into the screen. Bring about such effects.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lighting device, and more particularly to a theater lighting device that enhances a sense of presence by changing the lighting according to the brightness of the screen of a video device.

[0002]

[Prior Art]

 With the spread of video software and the full-scale commercialization of satellite broadcasting, the number of homes enjoying viewing on a large screen is increasing, and the demand for television receivers with a screen of about 30 inches is increasing. In addition, it is not unsatisfactory for a direct-view type television receiver whose production limit is about 43 inches, and it is not uncommon for homes to introduce a full-scale AV system that projects images on a large screen of about 100 inches using a projector. , Home theater has become popular with ordinary households without any hesitation, as is the method of viewing images that is no different from viewing in a general theater. Furthermore, the comprehensive AV system that combines audio (audio) and video (visual), rather than simply viewing the image on a large screen, enables the creation of an extremely high-dimensional theater space. In particular, surround systems that enable realistic audio reproduction can be easily configured by adding a few speakers to a surround decoder or AV amplifier. It is also popular in ordinary households.

[0003]

[Problems to be solved by the device]

 The conventional home AV system can increase the playback dimension to a level where it can be called home theater by combining a large screen and a surround system. However, the home theater produced from such an AV system is acoustically Although perfection is achieved, there are few cases in which the lighting in the theater space that surrounds the screen is totally designed including the lighting, and in many cases, a bright viewing environment or a viewing environment that suits the viewer's personal preference is provided. Or, the current situation is that the images are viewed in a viewing environment that is slightly darker than the lighting for everyday life. Some people didn't like the reflection from the screen and watched the image in a lighting environment where the lighting in the room was almost dimmed and the lighting environment was similar to that of the stand. .. However, the lighting of the theater space that surrounds the screen has a great psychological effect on the viewer, and despite watching the entertainment movie, people in the play appear in dim light and dark night scenes. If the lighting in the room you are watching is too bright, you may lose your sense of unity with the characters in the play. In such cases, it is often more realistic to turn off the lighting in the room. On the contrary, in the midday scene when the sun shines brilliantly, it is a fact that it is often more realistic to make the room illumination brighter. However, not only in home theaters of ordinary households, but also in large theaters where a movie is displayed on a large screen, the lighting that illuminates the viewing space is always the same brightness regardless of the content of the image displayed on the screen. Since it was maintained, there was a problem that the lighting in the viewing space almost never contributed to the presence.

[0004]

[Means for Solving the Problems]

 This invention solves the above-mentioned problems, and includes a video device for displaying a video on a screen, an illumination unit for illuminating a space where the screen of the video device is located, and a video for displaying on the screen of the video device. An illumination control unit that detects brightness and changes the illumination of the illumination unit according to the brightness is provided.

[0005]

[Action]

 This invention changes the illumination of the space where the display screen of the video equipment is located according to the brightness of the image displayed on the screen.For example, the illumination is increased for a bright screen and turned off for a dark screen. The illuminance is controlled like this.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 is a schematic configuration diagram showing an embodiment of a theater lighting device to which the lighting device of the present invention is applied, and FIG. 2 is a circuit diagram of the lighting control device shown in FIG.

A theater lighting device 1 shown in FIG. 1 includes a television receiver 2 for displaying an image on a screen, a lighting device 3 for illuminating a theater space surrounding the screen, and a brightness of an image displayed on the screen. It is composed of a lighting control device 4 for detecting and varying the illuminance of the lighting fixture 3 according to this brightness.

The lighting control device 4 is connected to the video output terminal of the television receiver 2 and emits a remote control signal that changes in three steps in accordance with the brightness of the screen to control the lighting fixture 3 at a distance. The video signal sent from the television receiver 2 is first subjected to extraction of a luminance signal component in the low pass filter circuit 5, and then the pedestal portion is clamped to a constant level in the clamp circuit 6. The clamped luminance signal is converted into an average DC voltage in the smoothing circuit 7, and then discriminated into three luminance levels of high luminance, medium luminance and low luminance in the luminance level discrimination circuit 8. The discrimination output of the luminance level discriminating circuit 8 is converted into a predetermined code by the remote control transmitter 9, and is transmitted to the remote control receiver 10 attached to the lighting fixture 3 by being placed on a transmission medium such as infrared rays. The remote control receiver 10 is provided with a remote control switch 10a for manually switching the illuminance of the lighting fixture 3, and if the remote control switch 10a is operated to select the manual mode, the lighting control device is selected. It is also possible that the remote control receiver 10 does not receive the remote control signal from the remote controller 4 and maintains the manually set illuminance through the remote control switch 10a.

In the embodiment, the smoothing circuit 7 is provided with a certain time constant in order to prevent the brightness discrimination output from frequently switching in accordance with the screen brightness, and within a short time less than this time constant. The brightness fluctuation of is not considered to affect the brightness discrimination.

On the other hand, the remote control receiver 10 that has received the brightness levels divided into three levels from the lighting control device 4 sends a control signal to the lighting fixture 3 so as to switch the illuminance according to the brightness level. Therefore, the illumination for illuminating the viewing space can be switched to high illuminance for a high-luminance screen, medium illuminance for a medium-luminance screen, and low illuminance for a low-luminance screen. Therefore, when a person in the play appears in a dim light or a dark night scene, for example, when watching an entertainment movie, the lighting in the room watching this automatically becomes as bright as the screen. In the midday scene when the sun is dropped and the sun shines brilliantly, the lighting in the room automatically increases in brightness, giving a more sense of oneness with the person in the play and effectively increasing the presence. it can.

As described above, the theater lighting device 1 changes the illumination of the theater space surrounding the screen of the television receiver 2 in accordance with the brightness of the image displayed on the screen, and for a bright screen. The environment surrounding the screen is controlled to increase the illuminance by increasing the lighting and turning off the light on a dark screen, so by turning off the lighting when the screen is dark, the atmosphere of the screen can be improved. By providing a dimly lit viewing environment that is commensurate with this, and conversely, by increasing the illumination when the screen is bright, it is possible to provide a bright viewing environment that matches the mood of the screen. This makes it possible to create a viewing environment according to the brightness of the image and to bring the effect of drawing the viewer into the screen. Especially when used in combination with a surround system, etc. It creates an environment in which the visual and audio can be viewed at a high level due to the synergistic effect of vision and hearing, which enables entertainment movies, documentary movies or even small-scale home theaters. Can enjoy music performances and sports programs in the most suitable viewing environment.

In the above embodiment, the discrimination level of the luminance level discriminating circuit 8 is not limited to three stages, and the luminance level may be discriminated in two stages, or discriminately divided into four or more stages. You can

In the above embodiment, the screen brightness level is determined from the video signal output from the television receiver 2. However, as in the theater lighting device 11 shown in FIG. It is also possible to adopt a configuration in which the screen brightness detected optically is applied to the brightness level discrimination based on the screen brightness detected optically. In this case, the brightness of the screen is detected by the photo sensor 12 installed with the light receiving surface facing the screen of the television receiver 2, and the output of the photo sensor 12 in the illumination control device 13 is detected as shown in FIG. After smoothing by the smoothing circuit 7, the brightness level is discriminated. However, since the illuminance of the lighting fixture 3 is variably controlled according to the discrimination brightness, it is necessary to prevent the photosensor 12 itself from changing with an amount of light other than the target light received. By using the directional photo sensor 12 toward the screen of the television receiver 2, malfunction is prevented.

In each of the above embodiments, the television receiver 2 is taken as an example of the image device, but the image device may be a combination of a display and a video tape recorder, or a combination of a display and a laser disc player. Of course, the point is that it can display images on the screen. Further, the control of the luminaire 3 may be performed not only by the remote control signal but also by directly or wiredly connecting the luminaire 3 or the lighting control device 4 or 13, for example.

[0015]

[Effect of the device]

 As described above, according to the present invention, for example, when the screen is dark, the lighting is turned off to provide a dim viewing environment that matches the atmosphere of the screen, and conversely, when the screen is bright, By increasing the lighting, it is possible to provide a bright viewing environment that matches the atmosphere of the screen, and by creating a viewing environment that matches the brightness of the image, it is possible to draw the viewer into the screen. Can bring In particular, if a surround system is also used, it enhances both the visual and auditory sensation, and the synergistic effect of vision and hearing creates an environment in which video and audio can be viewed at a high level. This makes it possible to enjoy entertainment movies, documentary movies, music performances, sports programs, etc. in the most suitable listening environment even in a small home theater. Play.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a theater lighting device to which the lighting device of the present invention is applied.

FIG. 2 is a circuit diagram of the lighting control device shown in FIG.

FIG. 3 is a schematic configuration diagram showing another embodiment of a theater lighting device to which the lighting device of the present invention is applied.

FIG. 4 is a circuit diagram of the lighting control device shown in FIG.

[Explanation of symbols]

 1,11 Theater lighting device 2 Video equipment (television receiver) 3 Lighting means (lighting equipment) 4,13 Lighting control means (lighting control device) 10a Remote control switch

Claims (1)

[Scope of utility model registration request] 1. A video device for displaying a video on a screen, and an illumination means for illuminating a space in which the screen of the video device is located.
An illumination device, comprising: an illumination control unit that detects the brightness of an image displayed on the screen of the video device and that changes the illuminance of the illumination unit according to the brightness.