KR100406334B1 - An image presentation method and arrangement - Google Patents

Abstract

A method of displaying a complete image on an observer's retina, the image comprising a plurality of pixels located along adjacent lines. The display is achieved by deflecting a certain number of pixels displayed on the display onto the image recognition area of the retina, which successively displays all the pixels in the image. The display shows pixels in at least one band of a certain number of complete lines in the image. The pixels in the band are generated in parallel with each other, and each line successively displays pixels in all lines of the image or partial image. The band is deflected above the image recognition area of the retina as a unit synchronously with the generation of the lines on the display. The invention also relates to a system for use in implementing such a method.

Description

TECHNICAL FIELD [0001] The present invention relates to an image display method and apparatus,

Swedish Patent 910778-0 generally discloses, among other things, a system for displaying an image based on at least two variables, i.e., pixel location and pixel information, for an image using this principle. Thus, the image is composed of a number of pixels, each of which contains information about each pixel in relation to the pixel position given by two orthogonal coordinates relative to the reference direction from the observer, and intensity, color, polarization, etc. at each moment in time .

The new principle disclosed in the above-mentioned patent makes the image display system or display divide into two parts. Wherein the two portions are a first display device located a certain distance from the observer and a second display device located within the watch between the observer and the first display device. The display system also requires means for synchronizing the first and second display devices with each other.

According to the above-mentioned patents, when imaging with two mutually independent display devices, such a device can use different combinations of three variables, namely X coordinate, Y coordinate, and other combinations of pixel information such as intensity, color, Lt; / RTI > These variables are divided between two display devices, and a total of six combinations are possible.

Swedish patent application 9503503-6, which expires at the same time, discloses the simplification of a device requiring some of such a combination, especially in such a combination, where a display device located a certain distance from the observer has pixel information And information on the X-coordinate of each pixel. As such, the display device will display one line that continuously displays the pixels in every line of the image or image. The line may be oriented in a predetermined direction and may consist of pixels that are uniformly illuminated, or pixels that contain information about intensity, color, polarization, and the like. Thus, such a display is called a so-called line display.

The second display is suitably carried by the observer in the form of glasses (goggles) through which the line display can be viewed. Here, the second display device needs to have means for deflecting lines viewed or seen in other directions that are moderately vertical with respect to the advancing direction of the line, in order to obtain a complete image on the observer's retina. Thus, it is only on the retina that the image is completely present as the mean value formula over the maximum time interval corresponding to the insensitivity of the eye or the agglutination time.

The luminance of the resulting image is a limiting factor in this technique. Another limitation is that when displaying only one line on the display, it is not possible to display directly readable information on this line without the aid of another aid.

The present invention relates to a method for displaying a complete image composed of a plurality of pixels on the retina. Where the pixels are located along adjacent lines. And this method is done by deflecting a certain number of pixels shown on the display onto the image recognition area of the retina. These pixels continuously display all the pixels in the image. The image recognition area refers to the area of the retina in which the image display is viewed. The invention also relates to a system for use in implementing such a method.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in more detail with reference to its embodiments and the accompanying drawings.

1 shows a schematic diagram of a system comprising a deflection device in the form of a band display and a mirror-periscope,

Figure 2 shows the principle of the band display according to figure 1, and

3A-B show the processing method of the present invention.

It is an object of the present invention to provide an image display method and system that eliminates the above-mentioned limitation that can only be caused when a single line is deflected.

This goal is achieved not by deflecting each line but when a line of a band is deflected at the same time. Here, the lines of the band are generated in parallel on the display, and each of these lines continuously displays all the lines of the image or partial image. Thus, the image is rotated through the band synchronously with the deflection of the band in the opposite direction. As a result, the band draws a picture on the observer's retina.

Each line in the image is activated with a number of times equal to the number of lines contained in the band, thereby increasing the luminance by a corresponding factor difference.

Another advantage obtained by the use of a line in one band is that any pixel in the band can be used to display on the display information that can be read directly by the observer without the aid of an auxiliary means.

Thus, such a method as defined in the first section of the present invention shows that the display shows pixels in at least one band of a certain number of complete lines in the image, the lines in the band occur simultaneously in parallel, Continuously displays pixels in all lines of the image or partial image, and the band is biased synchronously with the generation of a line on the display as a unit over the image recognition area of the retina.

This technique can be used, for example, to construct a simpler display screen. This technique can limit the current display screen corresponding to all lines in an image to only a few lines and to a display screen complementing the screen as glasses worn by the observer, for example. This can provide many benefits when there is insufficient space relative to the total screen size.

The remaining features of the above described method and of the system implementing this method will become apparent from the appended claims.

The band display 1 shown in Fig. 1 means a display which preferably shows one or more bands for closely adjacent lines in an image. Each band may comprise, for example, 3-60 lines, and preferably includes 5-25 lines. Although other formats may be contemplated, a complete image may be based on, for example, the standard 625 line format.

In order to simplify the illustration of the present invention and its working principle, there is shown a three-line band display that displays an image consisting of only five lines.

Reference numeral 2 denotes a light beam from three lines to be displayed on the display 1. This three line band is deflected as a unit by a mirror-slider type deflecting device including a fixed mirror 3 and a vibrating mirror 4. For example, an observer can carry such two mirrors-a pair of glasses or goggles. The glasses deflect the line indicated by light beam 2 on the display vertically above the retina of eye 5. The deflecting motion of the mirror is suitably represented by a periodic oscillation motion in the form of a sinusoidal, triangular, or linear ramp. When nonlinear sinusoidal oscillation is used, the image distortion caused by linear deflection can be compensated by the method described in the above-mentioned Swedish patent application 9503503-6.

As shown schematically in Figure 2, in the practice of the present invention, all lines of the image or partial image are rolled through the display 1. Rolling can be contrasted with the effect on the TV set which gives the impression that the image rolls across the TV screen if the image sync is broken.

In an embodiment, the display is configured to simultaneously display three video lines. The lines are generated in parallel with one another, which is achieved by transmitting the image information about the three lines appropriate for each point in time at the same time, in parallel, from the shift register 6 to the display 1. As one alternative to a display operated by three electron beams, the display may consist of a display in which each pixel is composed, for example, of a light emitting diode or similar device. As such, the pixels in each line can be activated simultaneously, rather than sequentially.

The band of the line displayed on the display 1 is biased synchronously with the generation of the line with the aid of the deflection mirror 4 shown in FIG. 1, but its direction is opposite to the rolling motion on the display. Although the displayed image is actually still rolling, the observer seems to have stopped rolling. As a result, images containing a sufficient number of lines are drawn over the observer's retina for half a period of mirror oscillation. One so-called semi-image may be created in the interlace format for each half-cycle.

An image without a flutter can be obtained when at least one image field is seen during the eye agglomeration time, which is usually 10-20 msec. In this regard, the term image also includes, for example, partial images included in a mosaic image.

The principle of the present invention will be described in detail with reference to Figs. 3A-B.

Figure 3A schematically shows the band display at four different time points (a) -d). The display has three line positions (A, B, C) that simultaneously show three lines of the image when the image rolls through the display, where the image includes only five lines in the example shown.

Figure 3B illustrates how the corresponding image is drawn over the image recognition area of the observer's retina.

At time point (a), the display shows a complete image line (1,2,3), which is reproduced at the corresponding position of the retina through the medium of the deflecting mirror (4) shown in Figure 1 . At the next time point b), the display shows lines 2, 3, 4 because the line 1 has disappeared from the display and the mirror 4, which rotates synchronously with the line creation step, By deflecting the bands of the lines shown, these lines appear at the correct position on the retina. The corresponding partial image of FIG. 3B shows this.

Similarly, at the next time point c), line 2 no longer appears on the display, while line 5 appears first. At time point d), the band of the line begins to disappear from the retina and, after two further steps, re-enter the image field from below, following the recurrence spot of the mirror 4 shown in Fig. 1 It is prepared for. Images are drawn upwards on the retina in this way.

As is evident from this simplified model, as each complete image or partial image is created, each line, e.g., lines 3,4, is activated three times, i.e., the same number of times as the lines on the band display do. As a result, the luminance is tripled compared to when only one line is deflected. The more lines included by the band, the stronger the luminance.

Thus, the above-described principle enables the use of a display with only a few lines and nevertheless produces a complete image with high luminance in the observer's retina.

The present invention provides the advantage that when a display includes an essential number of lines, it can be used to display information that can be interpreted in the form of a deflection means without the aid of an auxiliary device. This can be achieved by using a given number of pixels on the display for such information. Along with this, the display can meet two different purposes.

As an alternative to one band of lines, the display may be designed to display two or more independent bands that are spaced or not spaced at the same time. This requires the provision of parallel and synchronized image information to different parts of the display.

The band of the line may be deflected using, for example, both flank of the sinusoidal oscillatory motion of the mirror. In this case, it is necessary to read information about the pixels in the line in different directions during the two-part vibration period. Alternatively, two planks may be used to convey different information to both eyes of the observer. Thus, the stereoscopic image can be presented to the observer. Triggering the display at a predetermined time point can be easily accomplished using a driver circuit known to those skilled in the art.

The present invention has been described with respect to bands of lines written in the X direction. However, if the deflecting means deflects the band in the second direction, which is usually the direction perpendicular to the first direction, then the principle is the same regardless of the direction in which the line is written. As such, the display may show a band of vertical lines, for example, going horizontally above the image recognition area of the retina by a mirror. The first display device may have information about the Y coordinate of each pixel, wherein the deflection in the X direction occurs in a display device immediately adjacent to the observer.

As described above, the deflecting means can be easily combined with the glasses. Of course, if desired, only one deflection means can be used for both eyes, and can be coupled to the system, such as the eyepiece. Alternatively, the system may have the form of eyeglasses.

As an alternative to the above-mentioned mirror-slip mirror, of course, the deflection can be achieved using any other suitable opto-mechanical device to account for the proper oscillatory motion. In addition, for example, a photoelectric modulator may be used. The sinusoidal vibrations mentioned in the examples can be replaced by other harmonic vibrations, and a combination of such vibrations can also be used.

Claims (12)

By deflecting a certain number of pixels appearing on the display and continuously representing all pixels in the image above the image recognition area of the retina, the image consisting of a plurality of pixels located along adjacent lines is completely In the method of displaying, Wherein the display shows the pixels in at least one band of a certain number of complete lines in the image, Wherein the lines in the band are generated in parallel with each other such that each line continuously displays the pixels in all lines of every line or partial image of the image, Wherein the band is deflected as a unit above the image recognition area of the retina synchronously with the generation of the line on the display. The method according to claim 1, And simultaneously bands composed of 3-60 lines, preferably 5-25 lines are simultaneously deflected. The method according to claim 1, And simultaneously deflecting several bands of mutually adjacent lines. 4. The method according to any one of claims 1 to 3, Using pixels given in said band of lines presented on said display for given direct readable information. 4. The method according to any one of claims 1 to 3, Deflects the band using periodic oscillations in the form of sinusoidal, triangular, or linear ramp, and Wherein the periodic oscillation motion is used to mutually reverse the two active deflection motions of the bands or bands having respective periods. 6. The method of claim 5, Displaying the deflection of the band or bands in one eye of the observer for a half period of the period; And And displaying the deflection of the bands or bands on the other eye of the observer for another half period of the period. 4. The method according to any one of claims 1 to 3, Characterized in that at least one oscillating mirror is used for each eye to deflect the bands or bands, the mirror being fitted to the glasses (goggles) and the display being visible through the glasses (goggles) Display method. By deflecting the pixels above the image recognition area of the retina, a certain number of pixels appearing on the display, successively representing all the pixels in the image, the image consisting of a plurality of pixels located along adjacent lines is completely The system comprising: The display representing the pixels in at least one band of a certain number of complete lines in the image, The system comprising means for generating lines in the band mutually in parallel, each line successively displaying the pixels of all lines in the image or partial image, and Wherein the system comprises means for deflecting the band as a unit over the image recognition area of the retina synchronously with the generation of the line on the display. The image display system of claim 8, wherein the display shows 3-60 lines at the same time, preferably 5-25 lines. 10. The method according to claim 8 or 9, And control means for addressing any pixel in the band displayed on the display as information that can be directly read. 10. The method according to claim 8 or 9, Wherein said deflecting means comprises at least one oscillating mirror. 10. The method according to claim 8 or 9, Wherein the deflecting means is implemented as a pair of glasses, and the display can be viewed through the glasses.