SE459697B - Device with sight angle movement and shadow effect - Google Patents

Abstract

In front of a light surface amplified by a lamp is arranged a movable darkened screen arrangement. During the movement phase, the screen can form its own shadow in counter light, so that it can act as a shadow caster. Characteristic of stimuli in the peripheral sight field are movement and light-increasing effects through visual reactions, which are experienced as a fluttering contrast. With the device on a vehicle, the optical warning appts. against rapidly occurring risks in the visual field can be activated, so that a protective reflex can be integrated with traffic awareness.

Description

459 697 10 15 20 25 30 35 2 The visibility and attention value of the visual perception stimulator is based on a combination of contrast and movement. Account has been taken of reducing effects of direct environmental light on the device, and to disturbing after-effects or direct such disturbances to the visual sense of due to the horizontal movement stimulation from the environment in connection with trip. The movement pattern of the visual perception stimulator is given a vertical direction, when used in situations where such disturbances may occur.

The vertical direction of movement also creates a natural movement pattern which seems to be particularly beneficial for animals.

One measure of the effect is that the movement, when properly balanced by the factors, holds an extra attention value peripherally. This applies to comparison with how the movement is seen in the eye sector. The movement is therefore perceived as fluttering those in the peripheral field of view. That effect is described by David Katz according to ci- tat: "the size of the movement on the periphery of the retina is significantly overestimated".

It can be added that this increasing effect can also be obtained from rotary light and flashing lights. But then it is required that the surroundings are dark enough. IN In practice, therefore, said visual signals cannot stimulate sufficiently good because daylight provides too low contrast, and because daylight reduces the relative brightness of the signals.

The visual perception stimulator has its own contrast effect thanks to a special ellt contrast element. Therefore, in daylight, it takes on the character of a shadow RE. This effect distinguishes the visual perception stimulator from traditional visual or signals. The special contrast element creates a self-contrast, which ken is the factor that makes the device visible within the entire field of view regardless the environmental light.

When stimulating animals, it has been shown that brightness is important. Despite movement with short light phases dazzles or fascinates animals easily by strongly light. The bright background surface therefore needs to be related to the ambient light. set for good stimulation effect.

The size of the visual perception stimulator is adapted to the visual angle sector, which is required at the current distance.

The problem is solved technically in such a way that a variable is specially designed contrast elements are placed in front of a bright surface. The contrast element is blackened and is more efficient with a porous structure. Thanks to a special movement pattern 10 15 20 25 30 35 3 459 697 A natural shadow is formed on the contrast element, which is required for mentioned visibility criteria. The intrinsic shadow and the shadow casting effect are generated partly because the contrast element is designed with a flat or slightly curved surface, and partly because this surface is turned away from the individual during the period of movement. At vertical movement, the turning should preferably take place downwards.

Two time factors are important for the stimulus value. Within each operating period shielded and exposed to the bright background surface. For best effect of shadow phase, the shielding phase must be about 50 Z of the period. Among others.502 of the period, both the exposure and the re-foreclosure take place. At c: a.l5O periods per minute a maximum is reached, above which flicker effects can increasingly disturb the attention response. The frequency of movement is tuned in relation to the response you need to stimulate. At a long distance (measured in time) only a attention with calm counter-reaction is sought. In case of fall then someone rushes in at a short distance in front of a vehicle, maximum speed is required to stimulate rapid counter-reaction.

The luminance of the bright background surface can be achieved for certain purposes only of a white or reflective surface. For the main uses and on long distances, however, some kind of lantern is required to achieve visibility current distances.

An embodiment which, in relation to device size, shows a large visual movement and which can be said to be a basic form, consists of a lantern in front of which a door is mounted, which then constitutes the special movable the contrast element. The door is mounted in its upper edge on a horizontal axis, which in turn is mounted at a height with the upper limit of the lamp. The lantern is free- is laid by lifting the door from its lowered hanging position towards the tan and brought up to a horizontal position. In order for the door to provide the best effect, it stops at the lowering approx. 250, before it reaches the vertical position.

Any protective glass can then be fitted parallel to the door. Therein- through the protective glass reflects to some extent direct backlight downwards. A shading screen protruding slightly above and in front of the visual stimulator, further enhances the natural shade. _ . The door can be operated in different ways, e.g. by connecting rod or track wheel with a curved track fl in its circumference, which surface should then be parallel lell with the wheel axle. For best stimulation effect or visibility must the arrangement causes the door to remain in its lower shielding position during about 50 Z of the period. 10 15 20 25 30 35 459 697 - * 4 The dark special contrast element can be arranged and moved by others. arrangement, so that the natural shadow is formed during the exposure of the light background. the reason: * A contrast element corresponding to said door can be provided with a central shaft. on. The shaft is mounted parallel to the light surface. Horizontal or vertical technical mode is selected depending on the application. In this way, the rest element is driven in front of the light surface in a simple balanced manner way. A possible stopping of the contrast element in a shielding position during 50 2 of the operating period can be arranged with e.g. round drive wheels.

With the same frontal device size as the hatch option gets the movement extent only half the angular size. It's a simple technique procedure, which can be used for short distances.

Slats similar to those used for marine optical signals may be used. das as a contrast element. However, they need to be skewed in the same way as the cover for best natural shadow effect. The entire lamella curtain also provides better shadow effect if mounted with the slats in horizontal position. and with its upper part further away from the light background than its lower part.

However, in order for the angular movement to have a sufficient angular magnitude, between exposing and shielding the light background in turn and word- “ thus a movement is generated over the entire light surface. technically complicated. ning. At Drivsyste- The advantage is partly that visual perception stimuli the lathe can be shorter in depth and partly that large range of motion can achieved in relation to device size.

The contrast element can be arranged in a double assembly, whereby it can rotated in a simple technical manner around or in front of a lantern. met becomes Rote- If it is around a lantern, the visual sensory stimulator has a certain resemblance to tation light. The rotatable housing then consists of paired contrast elements preferably on 2 sides of 4. The casing is thus square with 2 dark and 2 light transmissive sides with every other side of each kind. This double mounting can also be rotated in front of the lamp in question. That way you can generate different characteristic movement patterns. Z The blackening and shading of the contrast element is important and crucial. those for the function. Protective coverslips are therefore usually needed. By down- the angle of the same also reaches the effect of direct backlighting in mirrored downwards. to some extent 10 4 5 9 6 9 '7 5 An essential feature is that the visual stimulator thanks to the special The contrast element can provide visibility by means of a lower one brightness of the lantern than traditional visual signals, which depends the ability of the visual sense to be able to amplify the respective contrast component when both sas next to each other. By simultaneously touching the special contrast element in an angular motion, the property of the visual sense to the effect of the previous shading of the receptors in the retina re brightness to the bright surface than it has in reality.

By coordinating several units, one can generate peripheral visual impressions, such as similar to, for example, but running man or a bird. Thereby one can re- at the first moment of stimulation, recognize a movement pattern.

Claims (2)

459 697 10 15 Patent claims Visual sensory stimulator for stimulating humans and animals in time to pay attention to a danger or other phenomenon when the natural creature or the danger / phenomenon moves in relation to each other or for visual stimulation only, characterized in that it includes a special contrast element made with one or more flat surfaces or slightly curved ones, which are blackened. The contrast element is arranged so movably that it shows an angular velocity and thereby under daylight conditions produces a fluttering dark contrast shadow, which is achieved by arranging the special blackened contrast element in front of a light surface, and that the special contrast element is inverted during any part of the movement period. . 2. A visual perception stimulator according to claim 1, characterized in that the movement period consists of 2 phases. A phase when the special dark contrast element completely shields the light surface during cza S0 Z of the movement period and a phase when the contrast element exposes and again shields the light surface during the other 50 Z of the period.