CN104113750B - A kind of integration imaging 3D projection display equipment without degree of depth reversion - Google Patents

Abstract

The present invention proposes a kind of integration imaging 3D projection display equipment without degree of depth reversion, this device is made up of projector and micro reflector array, micro-pattern matrix is directly projected to the rear of micro reflector array by projector, the reflector element number that micro reflector array comprises is identical with the image primitive number that micro-pattern matrix comprises, and reflector element aligns with image primitive center, the reflector element of micro reflector array reflects the light that projector projects and assembles reduction, the 3D rendering that reproducing reverses without the degree of depth.

Description

An integrated imaging 3D projection display device without depth inversion

technical field

The invention relates to integrated imaging technology, in particular to an integrated imaging 3D projection display device without depth inversion.

Background technique

Integrated imaging includes two processes of 3D shooting and 3D display. In the process of 3D shooting, since each lens element that constitutes the microlens array has a unique imaging function, and each lens element records a small part of the information of the 3D scene from different angles, a corresponding image is generated on the back focal plane of each lens element. A tiny image with different angles of view is called an image element, so the microlens array records the information of different angles of the 3D scene on the back focal plane of the microlens array, forming a microimage array. During the 3D display process, the micro-image array is placed on the rear focal plane of the micro-lens array for display. According to the reversible principle of the optical path, the micro-lens array gathers and restores the light rays emitted by all the image elements and pixels, and reconstructs them in the front and rear of the micro-lens array. The 3D image is exactly the same as the 3D scene at the time of recording. The integrated imaging 3D display can construct a true 3D image, so it has the advantages of true 3D display, no need for auxiliary equipment, suitable for multiple people to watch, full parallax, continuous viewpoint, low cost, simple structure, ultra-thin screen (can be wall-mounted), etc. , has become a research hotspot for researchers from all over the world.

Since the shooting direction of the microlens array during 3D shooting is opposite to the viewing direction of the viewer during 3D display, there is a problem of depth inversion in the reconstructed 3D image. Researchers have proposed rotating image element method, two-step shooting method, gradient index microlens array method, etc. to solve the depth inversion problem. Both the rotating image element method and the two-step shooting method require additional image processing on the acquired micro-image array after 3D shooting, which will undoubtedly increase the operational complexity and computer processing time, while the gradient-index micro-lens array is difficult to manufacture and costly. high.

Contents of the invention

The present invention proposes an integrated imaging 3D projection display device without depth inversion, as shown in FIG. 1 . The device is composed of a projector and a micro-mirror array. The projector directly projects the micro-image array to the rear of the micro-mirror array. The number of reflection units included in the micro-mirror array is the same as the number of image elements included in the micro-image array. And the reflective unit is aligned with the center of the image element, and the reflective unit of the micro-mirror array reflects and gathers and restores the light projected by the projector to reproduce a 3D image without depth inversion.

Described micromirror array is shown in accompanying drawing 2, is made up of the transmissive area shown in white and the reflective unit shown in gray, and this transmissive zone has transmissive effect to the light projected by projector, and reflective unit is to the light projected by projector Has a reflective effect. The reflective units are arranged at equal intervals in the horizontal and vertical directions, and the horizontal and vertical intervals between adjacent reflective units are the same as the pitch of the image elements in the micro-image array, both being p . The total area of the micromirror array is S , the area of a single reflection unit is Q , and the duty cycle K of the reflection unit is

(1)

Where M and N are respectively the horizontal and vertical numbers of the reflection units included in the micro-mirror array.

Preferably, in the micromirror array, the duty cycle K of the reflection unit is most suitable between 1% and 10%.

Preferably, the reflective unit has the same shape as the micro image array.

The reflection unit of the micro-mirror array reflects and gathers and restores the light projected by the projector to reproduce a 3D image without depth reversal, as shown in FIG. 3 . The light from the micro-image array projected by the projector reaches the micro-mirror array, part of the light is transmitted through the transmission area and cannot be received by the viewer, and the other part of the light reaches the reflection unit and is reflected to be received by the viewer. As shown by the solid arrow in Figure 3. The reverse extension lines of the light reflected by the reflection unit intersect in the space behind the micro-mirror array to reconstruct a 3D image. Since the 3D image is formed by converging light reflected by the reflective unit, which is equivalent to rotating the image element of a traditional integrated imaging display device by 180°, the reconstructed 3D image has no depth inversion.

The present invention proposes an integrated imaging 3D projection display device without depth inversion, which realizes the integrated imaging 3D display without depth inversion through the reflection of the reflection unit in the micromirror array on the light rays of the pixels of the micro image array.

Description of drawings

Accompanying drawing 1 is a schematic diagram of an integrated imaging 3D projection display device without depth inversion proposed by the present invention

Accompanying drawing 2 is the micromirror array schematic diagram that the present invention proposes

Accompanying drawing 3 is a schematic diagram of the principle of an integrated imaging 3D projection display device without depth inversion proposed by the present invention

The pictorial labels in the above-mentioned accompanying drawings are:

1. Projector, 2. Micro-mirror array, 3. Micro-image array, 4. Transmission area, 5. Reflection unit, 6. 3D image

It should be understood that the above drawings are only schematic and not drawn to scale.

Detailed ways

A typical embodiment of an integrated imaging 3D projection display device without depth inversion of the present invention will be described in detail below to further describe the present invention in detail. It is necessary to point out that the following examples are only used for further description of the present invention, and cannot be interpreted as limiting the protection scope of the present invention, and those skilled in the art make some non-essential improvements to the present invention according to the above-mentioned content of the present invention And adjustments still belong to the protection scope of the present invention.

The present invention proposes an integrated imaging 3D projection display device without depth inversion, as shown in FIG. 1 . The device is composed of a projector and a micro-mirror array. The projector directly projects the micro-image array to the rear of the micro-mirror array. The number of reflection units included in the micro-mirror array is the same as the number of image elements included in the micro-image array. Both are M × N = 120 × 90, and the reflective unit is aligned with the center of the image element. The reflective unit of the micro-mirror array reflects the light projected by the projector and gathers and restores it to reproduce a 3D image without depth inversion.

Described micromirror array is shown in accompanying drawing 2, is made up of the transmissive area shown in white and the reflective unit shown in gray, and this transmissive zone has transmissive effect to the light projected by projector, and reflective unit is to the light projected by projector Has a reflective effect. The reflective units are arranged at equal intervals in the horizontal and vertical directions, and the horizontal and vertical intervals between adjacent reflective units are the same as the pitch of the image elements in the micro-image array, both being p = 5mm. The total area of the micromirror array is S = 270000mm ² , the shape of the reflection unit is the same as the shape of the micro image array, both are square, the side length of a single reflection unit is 1mm, and the area is Q = 1mm ² , according to the formula (1) It is derived that the duty cycle of the reflection unit is 4%.

The reflection unit of the micro-mirror array reflects and gathers and restores the light projected by the projector to reproduce a 3D image without depth reversal, as shown in FIG. 3 . The light from the micro-image array projected by the projector reaches the micro-mirror array, part of the light is transmitted through the transmission area and cannot be received by the viewer, and the other part of the light reaches the reflection unit and is reflected to be received by the viewer. As shown by the solid arrow in Figure 3. The reverse extension lines of the light reflected by the reflection unit intersect in the space behind the micro-mirror array to reconstruct a 3D image. Since the 3D image is formed by converging light reflected by the reflective unit, which is equivalent to rotating the image element of a traditional integrated imaging display device by 180°, the reconstructed 3D image has no depth inversion.

The present invention proposes an integrated imaging 3D projection display device without depth inversion, which realizes the integrated imaging 3D display without depth inversion through the reflection of the reflection unit in the micromirror array on the light rays of the pixels of the micro image array.

Claims (3)

1. An integrated imaging 3D projection display device without depth inversion, characterized in that the device is made up of a projector and a micro-mirror array, and the projector directly projects the micro-image array to the rear of the micro-mirror array, and the micro-reflection The mirror array is composed of a transmission area and a reflection unit. The transmission area has a transmission effect on the light projected by the projector, and the reflection unit has a reflection effect on the light projected by the projector. The reflection units are arranged at equal intervals in the horizontal and vertical directions, and adjacent reflections The horizontal and vertical spacing of the unit is the same as the pitch of the image element in the micro-image array, both are p , the total area of the micro-mirror array is S , the area of a single reflection unit is Q , and the duty cycle of the reflection unit is , where M and N are the horizontal and vertical numbers of reflection units included in the micromirror array, respectively, the number of reflection units included in the micromirror array is the same as the number of image elements included in the microimage array, and the number of reflection units and image elements The center is aligned, the light of the micro-image array projected by the projector reaches the micro-reflector array, part of the light is transmitted through the transmission area and cannot be received by the viewer, and the other part of the light reaches the reflection unit and is reflected, thereby being reflected by the viewer. The reverse extension lines of the light received and reflected by the reflection unit intersect in the space behind the micro-mirror array to reconstruct a 3D image. Since the 3D image is formed by the convergence of the light reflected by the reflection unit, it is equivalent to the traditional integrated imaging The image elements of the display device are rotated by 180° so that the reconstructed 3D image has no depth inversion. 2 . The integrated imaging 3D projection display device without depth inversion according to claim 1 , wherein, in the micromirror array, the duty cycle K of the reflection unit is between 1% and 10%. 3 . 3 . The integrated imaging 3D projection display device without depth inversion according to claim 1 , wherein the reflective unit has the same shape as the image element in the micro image array. 4 .