KR20180013607A - Apparatus and method for glass-free hologram display without flipping images - Google Patents

Abstract

The present invention relates to a glassless cylindrical hologram display device, which comprises: an element image generating unit; a lens optic part; a flip image blocking unit; and a housing part. The device and method for glassless cylindrical hologram display for blocking flip images block the flip images generated from a lens optical element such as a lenticular sheet to provide a stable three-dimensional image providing effect to an observer.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a non-spherical cylindrical hologram display apparatus and method for blocking a flip image,

The present invention relates to a spectacle-free cylindrical hologram display device and method for blocking a flip image, and more particularly, to a flip image blocking device for blocking a flip image in a display device having an optical filter for generating a flip image, Eye cylindrical hologram display device and method which are manufactured to have a housing case so as to block light of a light source.

The three-dimensional display device can be roughly divided into a non-eye-tightening system that can be largely watched without glasses, and a spectacular-type system that must be watched with glasses. The non-eye-tightening system is also referred to as an autostereoscopy system. The non-eyeglass 3D display device displays an element image composed of spatially shifted multi-view images while displaying images at different viewpoints on the left and right eyes of the viewer using a Parallax Barrier technique or a lenticular lens The corresponding light is projected so that the user can feel the three-dimensional feeling. In such a non-eyeglass system, a flip image is generally generated according to an angle of an observer. The observer observes the correct three-dimensional image when it is in the viewing region, but observes the flipped three-dimensional image when observing it outside the observation region.

According to a conventional three-dimensional image display apparatus using a patterned retarder having a wide viewing angle of Laid-Open Publication No. 10-2012-0059961, a three-dimensional image display apparatus using a patterned retarder includes a display panel; A pattern drifter attached to an outer side of the display panel; And a lens layer attached on the pattern reliader. The three-dimensional image display apparatus using the pattern reliader according to the present invention diffuses the left eye image and the right eye image through different polarizing axes through the patterned retarder and diffuses through the diffusion lens to emit a wide viewing angle .

As another prior art, according to a three-dimensional image display apparatus and method of Patent Registration No. 10-0710347, a three-dimensional image display apparatus for synthesizing two-dimensional projection images and reproducing them as a three-dimensional image, A head position detection unit for calculating a position of the observer head tracked by the head tracking unit, a head position detection unit for tracking the movement of the observer head observed in real time according to a signal input from the head position detection unit, A visible region regulating unit for regulating a visible region so that the images correspond to a new observer head position, and a two-dimensional image reproducing unit for regenerating the two-dimensional images in the visible region moved by the visible region regulating unit to compensate for the distortion of the three- Dimensional image without distortion even in the outside of the visible region It has been described that there.

However, in the conventional apparatus, the flip image problem is solved by producing a wide viewing angle for the optical element in which the flip image is generated or by tracking the position of the observer. However, the complicated optical element design and the position of the observer There was a drawback that tracking modules and software were required.

Therefore, it is possible to provide a flip image blocking unit for blocking a flip image in a display device having an optical filter for generating a flip image through a non-spectacle cylindrical hologram display device that blocks the flip image of the present invention, Eye cylindrical hologram display device and method which are manufactured to have a housing case.

According to an aspect of the present invention, there is provided a spectacle-free cylindrical hologram display device comprising: an element image generating unit for generating an element image from a three-dimensional object; A display unit for displaying the element image generated by the element image generating unit on a display panel; A lens optical unit positioned in front of the display unit and converting an element image displayed on the display unit into a three-dimensional image; A flip image blocking unit for blocking a flip image reproduced from the lens optical unit from being displayed; And a housing unit for shielding external light penetrating into the interior of the case including the display unit, the lens optical unit, and the flip image blocking unit.

The present invention relates to a spectacle-free cylindrical hologram display method, comprising: an element image generating step of generating an element image in an element image generating unit from a three-dimensional object; A display panel displaying step of displaying the element image generated by the element image generating unit on a display panel in a display unit; A step of converting an element image displayed in front of the display unit into a three-dimensional image transformed by the lens optical unit; A flip image blocking step of blocking the flip image reproduced from the lens optical unit from being seen by the flip image blocking unit; And a control unit.

The non-spectacle cylindrical hologram display device and method for blocking a flip image according to the present invention blocks a flip image generated from a lens optical element such as a lenticular sheet to provide a stable three-dimensional image to an observer, To provide more clean.

1 is a conceptual view of a display structure using a conventional display panel and a lenticular sheet.
2 is a conceptual diagram using a rotated lenticular sheet
Fig. 3 shows a principle of a content generation method for displaying a three-dimensional image on a rotated lenticular sheet
FIG. 4 is a flowchart illustrating an elementary-
FIG. 5 is a graph showing the relationship between the geometric-
6 is a view showing an observation image of the observer and a principle of flip image generation
7 is a conceptual diagram of a spectacle-free cylindrical hologram display device for blocking a flip image in the present invention
8 is a configuration diagram of a spectacle-free cylindrical hologram display device for blocking a flip image in the present invention
9 is a diagram illustrating a flip image removal principle
10 is a schematic view of an entire system including a housing part

The present invention relates to an ophthalmic cylindrical hologram display device, and more particularly, to an ophthalmic cylindrical hologram display device which includes an element image generating unit for generating an element image from a three-dimensional object; A display unit for displaying the element image generated by the element image generating unit on a display panel; A lens optical unit positioned in front of the display unit and converting an element image displayed on the display unit into a three-dimensional image; A flip image blocking unit for blocking a flip image reproduced from the lens optical unit from being displayed; And a housing unit for shielding external light penetrating into the interior of the case including the display unit, the lens optical unit, and the flip image blocking unit.

The lenticular sheet 200 is an optical element that is positioned in front of the display unit and converts an element image displayed on the display unit into a three dimensional image. And is rotated at a predetermined angle.

The present invention relates to a spectacle-free cylindrical hologram display method, comprising: an element image generating step of generating an element image in an element image generating unit from a three-dimensional object; A display panel displaying step of displaying the element image generated by the element image generating unit on a display panel in a display unit; A step of converting an element image displayed in front of the display unit into a three-dimensional image transformed by the lens optical unit; A flip image blocking step of blocking the flip image reproduced from the lens optical unit from being seen by the flip image blocking unit; And a control unit.

The element image generating step may include: a pixel selecting step of selecting a pixel; A lens positioning step of determining a position of the lenticular lens 210 corresponding to the selected pixel; A shortest position calculation step of calculating a point P coordinate of the calculated center line which is the shortest distance from the selected pixel; An intensity information acquiring step of acquiring corresponding point information of the three-dimensional object 300 using the selected pixel and the point P coordinates; .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. In the following detailed description of the preferred embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The same or similar reference numerals are used throughout the drawings for portions having similar functions and functions.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a non-spectacle cylindrical hologram display apparatus and method for blocking a flip image according to a most preferred embodiment of the present invention will be described with reference to the accompanying drawings.

The principle of the display method used in the spectacle-free cylindrical hologram display device of the present invention is that a display panel, which is a basic spectaclesless display method, and a rotated lenticular sheet, as shown in FIG. 1, can be used.

1 shows the relationship between the display panel 100 and the rotated lenticular sheet 200. Fig. At this time, if the observer's observation range is assumed as the left and right regions, it is preferable that the angle of rotation is within 45 degrees from -45 degrees. FIG. 2 shows a case where the vertical lenticular sheet 200 is rotated in an arbitrary angle direction corresponding to the size of the display panel 100. FIG.

3 is a conceptual diagram for searching for a point P at a shortest distance using one pixel and a center line of a lenticular lens 210 including the pixel in order to generate an element image content required for displaying a three-dimensional image . As shown in FIG. 3, the lenticular sheet 200 is rotated at a predetermined angle from the vertical center line of the display panel 100.

The (x, y) th pixel of the display panel 100 is included in the k-th lenticular lens 210. In the present invention, the shortest distance to the center line of the lenticular lens 210 is used for generating the elementary image contents 400.

The rotation angle of the lenticular sheet 200 is -45 to 45 degrees.

FIG. 4 shows a calculation process of generating the elementary image contents 400 in the elementary image content generator 30. FIG. The present invention provides a pixel selection method comprising: a pixel selecting step of selecting a pixel; A lens positioning step of determining a position of the lenticular lens 210 corresponding to the selected pixel; A shortest position calculation step of calculating a point P coordinate of the calculated center line which is the shortest distance from the selected pixel; An intensity information acquiring step of acquiring corresponding point information of the three-dimensional object 300 using the selected pixel and the point P coordinates; .

In the lentile positioning step, a lenticular lens 210 including (x, y) pixels is found. The order number k of the corresponding lenticular lens 210 according to the pixel value is calculated by the following equation (1).

Equation (1)

는 올림연산자이다. here

Is the rounding operator.

When the k-th lenticular lens 210 is determined, a shortest position calculation step of finding a point P that is the shortest distance between the pixel and the center line of the lenticular lens 210 is performed. When the lenticular lens 210 is used, the distance from the center line of the lenticular lens 210 to the point P where the (x, y) pixels of the display panel 100 meet vertically is the shortest distance, and the shortest distance is d . the intensity value of the (x, y) th pixel becomes the intensity value corresponding to the three-dimensional object 300 through the point P. Therefore, it is important to find the position of the point P. The process of calculating the position of the point P is as follows. First, the distance b between the (x, y) pixel and the x-axis coordinate passing through the center line of the k-th lenticular lens 210 is obtained as in the following equation (2).

Equation (2)

Where D is the diameter of the lenticular lens 210. The next step is to calculate the point P at the center line located at the shortest distance using this distance b. The coordinates (x ', y') of the point P are calculated by the following equations (3) and (4).

Equation (3)

Equation (4)

In the next step, the intensity information acquiring step, intensity information of the corresponding point of the three-dimensional object 300 is picked up using the coordinates of the center of the (x, y) pixel and the coordinates of the point P (x ', y'). This process is shown in Fig. If the distance between the lenticular lens 210 and the display panel 100 is g and the distance of the corresponding three-dimensional object 300 is z through the center point P (x ', y') of the lenticular lens 210, The corresponding points (X, Y) of the reference point 300 are calculated by the following equations (5) and (6).

Equation (5)

Equation (6)

Then, all pixels are repeated from the pixel selection step to the intensity information acquisition step. When the information is acquired in the information acquisition step for all the pixels, the final element image content 400 is acquired after the intensity information acquisition step.

6 shows the principle of observation image and flip image generation by an observer. That is, an image observed in a viewing region through a display panel and a lenticular sheet is reproduced as a correct image, but an image observed outside a viewing region is observed through a neighboring lenticular sheet, . These flip images provide false images to observers and cause human factor problems such as dizziness.

7 is a conceptual diagram of a spectacle-free cylindrical hologram display device for blocking a flip image in the present invention. The display device has a cylindrical structure, and an observer views the hologram through a display window on which a three-dimensional hologram is displayed.

8 is a configuration diagram of a spectacle-free cylindrical hologram display device for blocking a flip image in the present invention. In this configuration diagram, an element image generating unit for generating an element image from a three-dimensional object, a display unit for displaying the element image generated by the element image generating unit on a display panel, A flip image blocking unit for blocking a flip image reproduced from the lens optical unit from being displayed, a display unit unit, a lens optical unit, and a flip image blocking unit And a housing portion that shields external light penetrating into the interior of the housing.

In order to display a three-dimensional image through the display unit and the lens optical unit, an element image must be generated. The generation method may be changed depending on the optical element used in the lens optic portion.

Assuming that the optical element used in the lens optical unit is a rotated lenticular sheet, an elemental image can be generated by the process of FIG.

In FIG. 8, the elementary image generating unit performs a function of directly recording the three-dimensional object to be displayed using an image sensor such as a digital camera or generating an elementary image in a computer environment using a virtual camera.

The display device unit displays the element image generated by the element image generator on the display panel.

The lens optical unit is positioned in front of the display unit and performs a function of converting the element image displayed on the display unit into a three-dimensional image. An optical element that performs such a three-dimensional image conversion function is typically a lenticular sheet. When the lenticular sheet is used, the relationship between the display device portion and the lens optical portion has the following relational expression.

If the size of the display panel of the display unit is D and the focal length of the lenticular sheet of the lens optic is f, then a viewing angle at which a viewer views a correct three-dimensional image is as follows.

Equation (7)

Therefore, if an observer views a three-dimensional image in the viewing angle range shown in FIG. 6, a correct three-dimensional image can be observed. However, if a three-dimensional image is observed outside the viewing angle of Equation (7) do. These flip images provide distorted images to observers and cause dizziness.

Therefore, in order to block such unwanted flip images, the present invention uses a flip image blocking unit. The flip image blocking unit blocks the flip image reproduced from the lens optical unit from being displayed.

9 shows a structure in which a flip image blocking unit is installed in front of a display panel having a lenticular sheet. The flip image blocking unit is designed such that the flip image is originally blocked when the observer deviates from the viewing angle.

10 is an overall configuration diagram of the spectacle-free hologram display device of the present invention. The housing unit functions to block external light penetrating into the housing including the display unit, the lens optical unit, and the flip image blocking unit.

Therefore, the spectacle-free cylindrical hologram display device and method for blocking the flip image according to the present invention provide a stable three-dimensional image to an observer by blocking a flip image generated from a lens optical element such as a lenticular sheet, There is a remarkable effect that the image is provided more cleanly.

 The present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics and scope of the invention.

30: elementary image content generation unit
100: Display panel
200: Lenticular sheet
210: Lenticular lens
300: 3 Enchanted object
400: element image content

Claims (4)

An element image generating unit for generating an element image from a three-dimensional object; A display unit for displaying the element image generated by the element image generating unit on a display panel; A lens optical unit positioned in front of the display unit and converting an element image displayed on the display unit into a three-dimensional image; A flip image blocking unit for blocking a flip image reproduced from the lens optical unit from being displayed; And a housing part for blocking external light penetrating into the inside of the case including the display unit, the lens optical unit, and the flip image blocking unit.
The lenticular sheet according to claim 1, wherein the lens optic is a lenticular sheet positioned in front of the display unit and converting an element image displayed on the display unit into a three-dimensional image, Is rotated at a predetermined angle from the vertical center line of the non-spectacle cylindrical hologram display device.
An element image generating step of generating an element image in an element image generating unit from a three-dimensional object; A display panel displaying step of displaying the element image generated by the element image generating unit on a display panel in a display unit; A step of converting an element image displayed in front of the display unit into a three-dimensional image transformed by the lens optical unit; A flip image blocking step of blocking the flip image reproduced from the lens optical unit from being seen by the flip image blocking unit; Wherein the flip image is displayed on the display unit.
4. The method of claim 3, wherein the generating the elemental image comprises: selecting a pixel; A lens positioning step of determining a position of the lenticular lens 210 corresponding to the selected pixel; A shortest position calculation step of calculating a point P coordinate of the calculated center line which is the shortest distance from the selected pixel; An intensity information acquiring step of acquiring corresponding point information of the three-dimensional object 300 using the selected pixel and the point P coordinates; Wherein the flip image is displayed on the display unit.

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