SE500256C2 - System of sensory stimuli - Google Patents

Abstract

In order to survive, human beings and animals have a great need to immediately and enconditionally detect dangers and concerns wherever they may occur within the field of vision as well as a need of monitoring those, also in the case, where the central vision is directed towards another sector of the field of observation. These conditions of living may also be solved for technical dangers and concerns such as vehicles, aircrafts, beacon lights etc. Through stimulation using visual perception stimulators, which present effects of contrast and motion, thereby becoming visible within the entire field of vision at the intended distance, regardless of the light conditions in the surrounding area. A shading effect leads to the visibility being particularly manifest and distinct during foggy and snowy as well as sunny conditions. The shading effect also prevents isoluminance. By the use of visual perception stimulators having concurrent movements, particularly vivid effects of motion and distinctive patterns of motion may be generated. The particular vividness through controlling one or more secondary contrast members using patterns of screening, which differ from that of the primary contrast member, yet concurring during some part of the period.

Description

500 256 10 15 20 25 30 35 2 can also have a rhythmic angular movement with the whole body. Since the diffuse peripheral vision in daylight perceives these natural movements in the first moments as a lively shadow play but with the possibility of some immediate identification, a system of visual sensory stimulators with cooperating movements can produce similar lively shadow games to stimulate the individual. visual impressions, which are perceived at the first moment as an identifiable danger or matter, regardless of where in the field of vision they appear.

It is known from visual psychology studies that one can get the impression of a movement between two points of light, which are switched on and off alternately - the so-called "phifenomenet". If you do the experiment in a dark room, where no background seems to relate to, you will see a jumping light at a certain rate. But at a certain time ratio and at a certain distance between the light points, you instead see a light point, which moves between the positions. Such a movement can also produce two contrast elements, as their shielding phases occur alternately. On the other hand, the sought-after lively and growing movement cannot be achieved in this way. In addition, the special cooperating system is required.

In patent specification 8501185-6 it is mentioned that the best effect or visibility from the shadow phase is achieved, when this lasts for about 50 Z of the operating period.

In the cooperating system, a primary contrast element has this relationship, and one or more secondary contrast elements have a deviating shadow phase. In a simple basic form, the secondary contrast element begins its shielding phase after the shielding phase of the primary contrast element has lasted for a while, and the shielding phases of both contrast elements end simultaneously. The shadow effect still seems to be complete from the secondary contrast element, even if this is controlled to a shorter shading phase than the said 50 Z. This interaction between the contrast elements within a period of movement produces an angular movement which is twice as large as when the contrast elements change phases according to the phiphenomenon. Above all, the sought-after lively and growing movement is achieved with the interacting contrast elements.

The shading phase (s) of the secondary contrast element (s) is determined in each individual case, depending on which effect one wishes to achieve and which combination of movement pattern one strives for. With more complicated drive systems of the contrast elements, each contrast element can be alternately primary or secondary and also be controlled to changing directions of movement. This seems to be advantageous due to adaptation phenomena in peripheral vision under circumstances, when a matter needs to appear situational for a long time, e.g. a beacon for pilots. The same applies in conditions where the angle size increases too slowly to be perceived as rapidly growing, e.g. from emergency vehicles at longer distances.

Thanks to the completely independent contrast and motion effects against the background, no isoluminance arises either. Isoluminance can be achieved by e.g. the light from headlights, as the light itself is not visible against a light background. During World War II before the radar, attempts were made to make aircraft invisible with the help of headlights on their frontal surfaces. The light dimmed the dark parts. Such isoluminance also occurs in vehicles, as the sun shines directly on their fronts.

To the sharp gaze of man, however, these are particularly well visible. But for peripheral vision, the vehicle looks much worse than otherwise, as direct sunlight detracts from dark contrasts. The shadow play that visual perception stimulators with contrast and movement effects achieve brings about very distinct and good visibility in fog and snowfall, compared to what traditional lanterns and visual warning devices achieve. The shadow phenomenon does not diffuse in the same divisive way as the light of a lantern does. With systems of cooperating contrast elements, in addition to independent visibility under the mentioned visibility conditions and without disturbances of isoluminance, distinct and easily identifiable visual patterns can be generated.

The movement of secondary contrast elements must be carefully controlled in relation to the primary period of movement of the primary, in order to achieve the intended effect.

Prior art can be used for this purpose. In the door alternative, when the door is driven with a track wheel, the track wheel for the secondary contrast element is manufactured in the simple basic form with a shorter curved part of the track than the track has for the primary contrast element. Crankshaft systems, camshafts, eccentrically mounted gears and non-round ones can control the relative movement of secondary contrast elements, so that their angular velocities increase and decrease during each period. Sensors of various kinds

Claims (2)

25 15 25 25 256 4 can be arranged to react to the positions of the primary contrast element and control secondary contrast elements, which are then suitably driven by separate motors. This latter alternative should be particularly advantageous when the contrast elements are alternately primary or secondary, and when their directions of movement are to change. In the alternative with slats as contrast elements, these must also be controlled at different angular velocities within the respective system, in order for the intended vital stimulation effect to be generated. A practical possibility is to divide the slats into 2 groups, one group forming the primary contrast element and the other being driven with deviating phase length as a secondary contrast element. Patent claims Visual sensory stimulators arranged in systems with cooperating movements of the contrast elements for generating particularly vivid movement impressions, especially in the peripheral field of view in humans and animals, which system in a simple basic form is characterized by a primary contrast element being controlled by c : a 50 Z-shield shielding phase and a secondary contrast element are controlled to start their shielding phase later than the primary within each operating period and that both end the shielding phase at the same time. 2. A system of visual stimulators according to claim 1, characterized in that 2 or more contrast elements with cooperating movements within each movement period are driven in an alternating manner, so that the contrast elements can alternately be primary or secondary and obtain alternating directions of movement and fixed times.