DE10006207A1 - Partially unidirectionally radiating pulsed light projector produces spatial image with systematic directionally selected and defined unidirectional beam paths - Google Patents

Abstract

The device produces a spatial image using systematic directionally selected and defined unidirectional beam paths with light emitters (2) generating pulsed focused light. One or more light emitters is combed with an actuator to form a base element. A defined number of base elements is combined to form a functional unit or image bearer surface (8). The emitters are mounted on a bearer plate with a crossed gimbal for omni-directional deflection.

Description

The invention relates to an image carrier for generating autostereoscopic viewing any complex images or image sequences and contents with perspective Views of the recorded object field through partially unidirectional bundled pulsed light wave transmission for the viewer in the entire on Viewing angle of the device without determining the position and without necessary additional spatial image display aids for the viewer.

Known from US 4,571,616 and DE 35 29 819 are projection devices with a screen plane in which the screen is grouped into cylindrical lens-shaped grids in order to generate stereoscopic images. Images are split into vertical lines and projected onto the back of the screen, which are then directionally selected by the cylindrical lenses in front, which gives the viewer a spatial image effect. Furthermore, anaglyph methods are known, in which two laterally shifted projected images, which when viewing the projected images with the help of color filter glasses, the glasses of which are colored in exactly the same colors of the two projected images, produce a three-dimensional representation. Are otherwise known as shutter glasses (Chip 5/98 pp 32) the time-shifted the view of the image in synchronism with the Bildschirmdar position for the right and left eyes release and thus produce a three dimensional image.

A three-dimensional display is known from JP 07-64 020 A, in which a Display area can be made of several simple lenses that have a convex lens short focal length, a light source, and an elastic positioned in between Drive. By varying the distance between the convex lens and the light source with the help of the flexible drive, the position of the the convex lens image of the light source changed to finally imagi project när pictures. The device also includes the possibility that these simple lenses can be organized into geometric figures, e.g. B.  Cylinder or spherical body, so that the projection of the imaginary "front or back image "made possible by the viewer within a viewing radius of 360 ° can be. With such image projection techniques for the eye, the apparent Create images imaginatively in space by zooming with simple lenses, and a perceptual psychological effect (without glasses or similar aids) use, which is based on an empirically and visually acquired memory, is exploited that the distance assessment of an object in combination hang stands with the size of its perceived image.

The known image display devices use for spatial image display diffusely emitting light sources or points, the emitted light for use is additionally processed or fanned by optics.

A disadvantage of the above-mentioned anaglyph process is the high color compo loss of pension. In the aforementioned shutter glasses method, there is Disadvantage of having to use special glasses with their known disadvantages and inconveniences.

In US 4,571,616 and DE 35 29 819, the three-dimensional image effect is proportionally impaired when the viewer changes the viewing angle and the distance to the screen in order to be able to perceive larger spatial perspectives of the image objects. This explicit disadvantage cannot be eliminated even by moving the grid more elaborately. This method requires a high level of technical effort in order to increase the spatial image effect in such a way that hidden image contents can be conveyed to the viewer. This is done by duplicating the vertical lines, by additional projections, or by adapting them to the viewing position (calculation). In any case, this method has the disadvantage that the stereoscopy is lost when the screen is rotated around an orthogonal screen. This disadvantage comes to bear when rotating screens or screens with a horizontal plane of the screen ( "Responsive Workbench" - Chip 5/98 32), which are used by multiple viewers simultaneously. In the aforementioned methods, with the exception of the shutter technology, only the vertical line screening method in a wide variety of variations is used, with the design disadvantages of a considerable depth of the screen.

The method of image projection techniques using simple lenses contains comp chen with the above procedures significant quality reductions with higher techni as financial expense, which multiplies considerably with increasing more complex or moving picture content to be conveyed.

The known image display devices have the disadvantage that for loading Processing or fanning out the diffusely emitted light of the emitting Light sources or points additional separate optics are required.

Starting from the prior art, the invention is therefore based on the object to develop an image display technique of shallow depth, its image display surface creates a spatial image for the viewer, without separate technical aids tel and without a fixed positioning of the viewer in the viewing angle the image display area is necessary, even if it is rotated around the orthogonal, in order to obtain a spatial effect, provided that it is inexpensive against mass production.

The object is achieved in that the device according to the Claim 1 is executed.

As a light source, light emitters come with the ability to bundle light strongly at ge low divergence (unidirectional), suitable intensity and the performance requirement generation of short to extremely short pulses. The light emitter ortho gonal is directionally arbitrary by means of actuator from the image carrier orthogonal deflectable, so that the light beam emitted unidirectionally by the light emitters del to any point of a defined mathematics above it dome can be aligned.

The actuator is characterized in that it has one or more light emitters can direct.

The listed components result in a basic element, any of which many can be combined to form a function matrix (image carrier). This function matrix can in turn be used as an element for large area screens organized into a large area matrix (image carrier).

The function of the basic element is explained by light waves from this element  in the congruence mapping position, which of the object to be displayed in the same unidirectional beam path would be emitted and / or arithmetically were averaged to be emitted. This is done by the mathematically defi The imaginary dome is systematically moved, with the unidirectional emitted pulsed light waves and the speed of the scan too are in a mathematically determinable relationship and the Perception performance (image quality) of the viewer is sufficient.

The matrix composed of the basic elements, which is the image carrier represents and the described basic function of the individual basic elements Organized in terms of processes, meets the requirements of the he targeting spatial image quality.

The advantageous effect of the invention is that light waves are possible to select unidirectionally according to their beam paths, which of to represent the object would be / would be emitted to make it congruent to the viewer to convey procedural pulsation in a time-based manner, which ensures that a three-dimensional character of the image content to be displayed, high quality can be transferred to the viewer and this almost simultaneously for both au gene.

A great economic advantage is that the new one presented here Technology itself with the characteristic of simplifying it (tilt axis reduction / - halving) can replace the lenticular lens system in its rendering technique, and this in a super flat screen design, the carrier also the Possibility to be flexible.

The device is capable of maintaining the same spatial image content without aids To convey quality, even if the screen is on its orthogonal axis or the viewer is within the viewing angle to the screen Position changes.

Another major commercial advantage is that existing masses manufacturing techniques such as photolithographic processes, wet chemical etching methods, Proton implantation, etc. as well as their combination for the complete production of the device elements can be used.

For the user of such a device there is the high level of convenience of the low  Weight (with a very flat design) of the projection device, ins especially with portable devices or home screens.

The device is capable of generating each image column for the spatial image to use both eyes of the viewer, in contrast to the lenticular lens system. Furthermore, the device can be used without technically specified ones Frame support construction (rimless), which has the advantage of screens and screens to be able to organize one another without disruptive interruptions.

The image carrier in an application example is composed of a matrix of cardanic actuators with a central carrier plate ( 1 ) and corresponding light emitters ( 2 ) to form an image display area. The single gimbal actuator ie the single device for all-round rotatable suspension of a body (here light emitter ( 2 )) as a torsion actuator ( 3 ) is explained by the known manufacturing technology, which che is used z. As in scanning technology (on Silicon mirrors and Micromir ror arrays for Spatial Laser Beam modulation, Transducers 97, Intern. Conf. So lid-State Sensors and Actuators, Chicago in 1997 and electronics 24/1999).

The torsion actuators used ( 3 ) allow a high oscillation frequency in all directions of the viewing angle of the viewer, also a simple geometric sectioned arrangement to each other, whereby a narrow configuration of the light wave emitters ( 2 ) and their uncomplicated power supply is achieved by conductor coating without material interruptions.

The central support plate ( 1 ) of the torsion actuator ( 3 ) is, if necessary, see schematic representation Fig. 2, provided with a spacer plate ( 4 ) to accommodate the size of the torsion actuator ( 3 ) corresponding light emitter ( 2 ), whereby that the image display area has only the slightest light emitter defects. On the spacer plate ( 4 ) or directly on the central carrier plate ( 1 ) there are several radiation emitters, which are due to strong light bundling, low di vergence, small spectral line width (monochromaticity, coherence), as well as suitable intensity and the possibility of generating short pulses award.

If the requirements are less, it is sufficient, as in FIG. 1, that the central carrier plates ( 1 ) are coated directly with light emitters ( 2 ) in order to organize a matrix from them as an image carrier.

Claims (6)

1. Device for the congruent reproduction of a defined recorded and / or calculated spatial object field of any complex content, characterized in that this spatial image transmission by systematic, directionally selected and defined unidirectional beam paths through light emitters, which generate pulsed and focused light, takes place by these light emitters, one of which one or more can organize themselves with one actuator to form a basic element, and by means of its (actuator) deflection, a mathematical dome located above each light emitter can process point-by-point, covering the entire area in sequence, in the direction of the viewer's potential viewing area, where a certain number of Basic elements are combined to form a functional unit, an image carrier surface. 2. Device according to claim 1, characterized in that the or Light emitter on a carrier plate with a cross gimbal for the purpose of all sides deflection of the unidirectional beam paths. 3. Device according to claim 1 and 2, characterized in that a Di punching plate is placed on the carrier plate, then at a distance from the carrier plate, the light emitters are almost covered to the actuator. 4. Device for generating three-dimensional images characterized thereby records that one or more light emitters with the ability pulsed bundled To generate light which, by means of actuator deflection, has a ma thematic half cylinder with fan beams systematically sequential processual straight line, covering the sequence in the direction of the potential To be able to shine through the viewer's viewing area, to egg themselves with the actuator organize a basic element, with a certain number of basic elements are combined into a functional unit, an image carrier surface. 5. The device according to claim 4, characterized in that the or Light emitter on a carrier plate with a rocker for the purpose of win deflection of the radiation fan. 6. The device according to claim 4 and 5, characterized in that a Di punching plate is placed on the carrier plate, then at a distance from the carrier plate, the light emitters are almost covered to the actuator.