WO2006131584A2

WO2006131584A2 - Improved back-projection system

Info

Publication number: WO2006131584A2
Application number: PCT/ES2006/000339
Authority: WO
Inventors: José María TAFALLA GARCIA; José Ramón BLASCO PUCHADES
Original assignee: Technical Screen, S.L.
Priority date: 2005-06-10
Filing date: 2006-06-09
Publication date: 2006-12-14
Also published as: ES1060482Y; ES1060482U; WO2006131584A3

Abstract

The invention relates to an improved back-projection system which is based on an information point (1) comprising a screen and a keyboard (10) and which is equipped with a projection screen (4) for the projection of dynamic advertising or information images which are reflected by a mirror (3). The invention employs computer (7) and multimedia (5) means and uses the projection unit (2) as an image transmission device, said unit being formed by two synchronised projectors having adjustable light intensity. The invention also comprises an ambient light photosensor (9), noise level detection means (6) and a television and/or radio antenna (8) which, by means of precise processing, can transmit the signal received through the projection unit (2).

Description

PERFECTED REARPROJECTION SYSTEM

Object of the invention

The present invention relates to an improved rear projection system, linked to an information point in which a multiple projection unit is included, with perfectly synchronized projectors, which emit the images on a mirror that reflects the beam towards a screen, allowing in this way increase the range of light intensity and adapt it to ambient lighting conditions, as well as a remote activation audio system capable of transmitting the messages or sounds that at any given time may interest.

Its field of application is the industry dedicated to the manufacture of dynamic advertising media.

Background of the invention

At present, most of the dynamic advertising that can be observed in the streets of cities is about posters which change their advertising message from time to time perfectly predetermined. Although this system has many advantages over static advertising, the author of the present invention considers that it is very likely to be improved in order to achieve greater message collection by the user. In addition, these posters emit their messages in the same way, regardless of the environmental conditions of the place (light and noise).

^~ Some authors, in order to alleviate some of these problems, devised the advertisement through rear projection systems, giving it a more dynamic character to these media. This is the case of some overhead projectors marketed today, protected in the invention patent document P 200200608 by "Information Projection Unit" where a device with an overhead projector located at an information point is shown. This point of information to the user is a support to include the dynamic advertising, in which the projector emits images on a mirror of tensioned sheet or wide angle lens that extend the image on a translucent screen visible from the outside, maximizing the available space inside the information point. This device, having an overhead projector has the disadvantage that as the image moves away from the perpendicular projector-mirror-screen line, it gradually becomes distorted.

On the other hand, this device does not have means for controlling the light emission power of the projector, so that the emission intensity is the same regardless of the environmental conditions and the time of day or night. This entails a certain energy expenditure (the maximum consumption of the device) and a shorter life of the projection lamps due to the constant maximum intensity at which they work.

Description of the invention

With an improved rear projection system, object of the present invention, it is intended to improve the above-described drawbacks, for this, it is based on the structure of an information point, of which are used in some municipalities and places of public information, which are It is connected via telephone with a control center and data process.

Inside, there are electronic and computer media that control and allow the emission of the images that you want to project as dynamic advertising. For this purpose a projection unit is used, consisting of one or more projectors, although preferably they will be two or more, which synchronized, emit the images on a mirror, which in turn reflects these on a display screen from the outside.

These projectors have light intensity regulation, controlled by a photosensor that depending on the ambient light (sunny, cloudy, night, etc.), sends a signal to a data processing center that shuffling this parameter determines the emission intensity of the projectors, so that at times when this intensity is less than the maximum power, it is contributing on the one hand to a saving of energy and on the other to a greater duration of the projection lamps, increasing the performance of the same. All this implies an increase in the range of intensities used in the device.

In turn, the fact of incorporating two or more projectors, supposes an increase in the quality of the image, insofar as the distortion of the image, emitted by each of the projectors, is corrected by superposition of the images emitted by The other projector (s).

In addition, the proposed device has a television antenna, which provides images and sound in real time from this medium.

At the same time, this rear projection equipment has a remote activation audio system with software that detects ambient noise and, depending on its measurement, maintains the volume at 92 dB.

With this rear projection system, a more attractive and dynamic information point is achieved, in which the advertising images are emitted while it is operational, since these are two independent systems. It incorporates the advantage that at a given time messages can be issued to the population of general interest to the population through the loudspeakers available to them, or broadcast the images via television, internet, etc., which thus need to be specified for any reason. , since the connection with a remote control center is constant.

Description of the drawings

To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, this descriptive report is attached as an integral part of the W

The same, a series of figures in which, with an illustrative and non-limiting nature, the following has been represented:

Figure 1.- Represents a schematic profile view of a practical embodiment of an improved rear projection system, object of the present invention.

Figure 2.- A schematic front view of the previous figure is represented.

Figure 3.- Exploded of a structure of the overhead projector object of the present invention.

Figure 4.- Schematic view of an information point with the application of the proposed overhead projector system.

Preferred embodiment of the invention

As can be seen in the attached figures, a body or structure (1) is distinguished first from the information point (10) that involves the accommodation of the other elements, such as the projection unit (2) that emits its beam of images towards the mirror (3), and this in turn refers to the projection screen (4); The intensity of the mentioned beam will be determined by the reading of the photosensor (9) of ambient light. In the same way, means are available for the emission of sound (5) and sensors (6) for the capture of the level of ambient noise.

This device is used by users for the extraction of

The information that the relevant agency (City Hall, Delegations, Consellerias, etc.) may offer through these services, which is extracted through its corresponding keyboard, screen (10), etc. The system is governed by a computer center (7), which directs the various devices through the corresponding remote control. Also included among these is a television and / or radio antenna (8) which, through precise processing, is capable of emitting this received signal through the appropriate means.

The mirror (3) used does not require it to be tensioned, but it will be the one that allows the refraction of the image in the best conditions of possible quality, as is likely to use lenses for the enlargement of the image.

The projection unit (2) is composed of one or more projectors, although at least two projection units are preferable, which are synchronized, forming a team of "twin" projectors that superimpose two images on the mirror (3) so that, the deformation of the image by picking (due to the angle that forms the shortest and the longest distance from the projector to the mirror) is greatly reduced by the superposition of the images of the projectors. With this, an increase in the field of vision of the final projection on the screen is achieved, with greater clarity.

Another advantage that it brings is the sum of light intensities, that is, the final light power will be the sum of the powers of the projection equipment involved, providing greater image intensity. In turn, if we take into account that these projectors are adjustable in intensity depending on the ambient light, whose measurement will be facilitated by the photosensor (9), we obtain a system in which in conditions of low ambient luminosity (cloudy, night, etc.) with a lower emission intensity it is sufficient for the purpose pursued, favoring energy savings on the one hand and, on the other, the life of the projector lamps that are the highest cost consumable of the system is increased.

The television and / or radio antenna (8) will be used when, for any reason, it is considered appropriate to issue certain information / advertising through this means through the projection screen (4), such as certain sporting events. , news of general interest, etc .:, which can be followed not only through images but also through sound through the speakers (5). Likewise, messages can be issued in real time that are of interest to the population, such as warnings, emergencies, etc.

The sound emission is regulated by a decibel sensor or meter, which, once processed this data collected from the environment, emits at a sound level that does not exceed 92 dB, in order not to favor noise pollution.

The intercommunication with this overhead projection system can be done via telephone (landline or mobile), Internet or any known method, connecting with the central computer process (7).

Its application and operation is very simple, for this part, as mentioned above of an information point (1) of those that appear in cities, in which the user through a screen and keyboard (10) It serves as the available information. Independently, through the projection screen (4) advertising images of the entity that hired these services are being issued.

For this, in the central computer unit (7) the images (photographs, videos, movies, DVDs, etc.) that the projection unit (2), through the projectors emits towards the mirror (3) oriented of such that the rear projection affects the screen (4). These projectors are synchronized so that the images overlap exactly leaving no dead angle (sting), which widens the sharp field of vision.

The intensity of the projection light is determined by the measurement of the photosensor (9) of the intensity of ambient light, which contributing said data to the software of the computer unit (7), promotes the corresponding image intensity.

In the same way, the sound that is emitted through the speakers (5) is regulated by the reading of the sensor (6) so that, never exceeds a certain volume (for example 92 dB).

With this improved overhead projection system, it is achieved that through a public use device (information point), the advertising message (or information) reaches a large number of potential users (information points located in places of maximum concurrence), in an attractive and dynamic way, including the broadcasting of television, radio, etc. programs, at the will of the manager of this information point.

Once the nature of the present invention has been sufficiently described, as well as a practical application thereof, it only remains to be added that, both its form and the materials and execution thereof, are susceptible to modifications, provided they do not affect Substantial form to the characteristics claimed below:

Claims

1.- Improved rear projection system, from which, based on an information point (1) with its screen and keyboard (10), there is a projection screen (4) on which dynamic advertising or informational images are projected, reflected by a mirror (3), and uses multimedia (5) and computer media (7), characterized in that, as an image emission device, it uses the projection unit (2) adjustable in light intensity, which emits its image beam towards the mirror (3), incorporating a photosensor (9) of ambient light, as well as means (6) for the capture of the noise level, a television and / or radio antenna (8) is also included that By means of the precise processing it is able to emit this received signal through the projection unit (2) through the mirror (3) to the screen (4).

2.- Improved rear projection system, according to claim one, characterized in that, the projection unit (2) is composed of at least two projection units, which are synchronized, forming a team of "twin" projectors, which overlap two images of the projectors on the surface of the mirror (3).

3.- Improved rear projection system, according to the first and previous claim, characterized in that, the intensity of the beam of light emitted by the projectors is determined by the reading and processing of the measurement of the intensity of ambient light provided by the photosensor (9) .

4.- Improved rear projection system, according to claim one, characterized in that, the sound emission by the speakers (5) is regulated by a decibel sensor or meter (6), which, once processed this data collected from the environment, emits at a sound level that does not exceed a predetermined volume.