DE449655C - Device for demonstrating advertising on a universal light or color flap structure - Google Patents

Description

Device for displaying advertising on a universal light or -Colour flap structures The development of light advertising with incandescent lamps started from Fixed fonts, led to the wandering script via interchangeable, switchable letter sets and for showing live lightbulb images. The demonstration of living images To this day, films have been limited to closed, darkened cinema rooms. One could make a film have a bad effect on a large popular assembly. The effect of the for the large mass advertising strips, which in a very excellent way attract attention and are therefore an excellent means of advertising, was limited to the cinema audience. An open-air cinematography was previously not possible.

The invention relates to a device which the open-air cinematography enables, (read light bulb cinema. Through it it is possible to create any light image or the living image of a film (especially drawings and animated film images) into one on a universal light bulb shade or universal color flap panel to transmit appearing, widely luminous image or moving image. -The new is that the light bulbs or color flaps of the universal structure from one Projection device can be controlled from its light image or living image is thrown onto a screen that is universally occupied with light-sensitive cells, which bring the light bulbs belonging to the picture to light up via the associated relays or move the colored flaps to the viewing position. Come as light sensitive cells Selenium cells or better photoelectric cells (photocells, e.g. the potassium cell according to F 1 s t e r c & G c i t e 1) in question.

The invention is shown in the drawing. According to Fig. I falls the light of a lamp or a brightly or only moderately illuminated surface a photocell loaded with a load battery. This supplies a photocurrent, whose strength is exactly proportional to the intensity of the incident light. This Photocurrent can be used immediately or after amplification, e.g. B. through one in the wireless Telegraphy usual electron tube, energize a relay, so that a secondary circuit When the photocell is exposed, it is closed; when the exposure is stopped, it is opened again becomes (or vice versa). Instead of the photocell, you can also use a Apply selenium cell.

This secondary circuit energizes an incandescent lamp (Fig.2). If light falls on the cell, the relay closes the secondary circuit, and the lamp lights up. If the cell stops being exposed, the lamp goes out again.

These are combined in the incandescent or color flap cinema light-sensitive cells into a universal structure instead of that form a projection screen, and they are connected to a relay via relays Universal light or color flap panel.

With a projection device, a photograph (drawing or Writings, etc.) or film image (cartoon, silhouette film) on the cell screen thrown. The relays are tuned so that they only power the secondary circuit close when they are replaced by a blackened surface element of the photograph or Films are irradiated, but not if they are exposed to a blackened surface element be irradiated. This is easy to achieve because of the incident light intensities and thus the supplied photocurrents differ considerably from one another. If you want ordinary black and white films, i. H. in other words, films that are in constant transition of all brightness levels, project with the incandescent cinema, that's how you will proceed as follows: Man. refrains from constantly reproducing all brightness transitions. The brightness interval is divided from the brightest white of the film to the deepest Black on the basis of the gray scale (see the theory of colors by Wilhelm p s t w a 1 d) into one limited number of. same brightness levels, e.g. B. of five levels. then four different combinations of photocell plus relay are made; in such a way that when the photocell is first put together, it is not with the first brightness level, but already with the second the relay responds (All the more so with. Exposure with all of the following - brightness levels). In the The second compilation speaks to the second when the photocell is exposed Brightness level, the relay does not yet turn on, with exposure to the third brightness level on the other hand well and therefore also with the exposure with the fourth and fifth brightness levels etc. The third combination only speaks to the fourth and fifth levels of brightness and the fourth compilation only applies to the fifth level of brightness. Thereupon the basic elements are combined into groups of four such combinations. In order to get a reasonably consistent picture, the total number must therefore also be of the basic elements can be roughly quadrupled. The reproduction of all occurring brightness values any black and white film will be sufficient with such an arrangement be.

each photocell of the cell screen brings about one when exposed to light Relay the corresponding light bulb of the light bulb shade to light up, so that the photo or film image in the form of a widely illuminated luminous image of any Size (depending on the choice of bulbs used) appears. As a result of indolence of the incandescent lamps, the jerky sequence of the film images does not appear at all, rather, it creates a constant image of movement.

All photocells can be loaded with the same load battery and all incandescent lamps are fed by the same power source (Fig. 3 and 4).

If you get one on the one side black, on the other side white plate or flap by the secondary flow lights up, you can also use a universal flap umbrella show photos and films in daylight so that they can be seen from afar.

Claims (1)

PATENT CLAIM: Device for displaying advertising on a universal light or color flap structure, characterized in that the incandescent lamps or color flaps of the universal structure are controlled by a projection device, whose light image or living image is displayed on a screen that is universally occupied with light-sensitive cells is thrown, which bring the light bulbs belonging to the picture to light up via associated relays or move the colored flaps into the viewing position.