KR20080062912A - Three dimensional image display device - Google Patents

Abstract

A three dimensional image display device is provided to reduce fatigue of an eye by adjusting a three dimensional image to a focus of the eye. A three dimensional image display device includes first and second micro-display elements(100a,100b), first and second lenses(150a,150b), and first and second light path control elements(110a,110b). The first and second micro-display elements are arranged in parallel to be separated from each other. The first and second lenses are arranged at rear sides of the first and second micro-display elements respectively. The first and second light path control elements are positioned between the first micro-display element and the first lens and between the second micro-display element and the second lens respectively.

Description

Stereoscopic Display Device {THREE DIMENSIONAL IMAGE DISPLAY DEVICE}

1 is a schematic diagram illustrating a conventional stereoscopic image display device;

2 and 3 are views for explaining a stereoscopic image display device according to the present invention;

4 is a view for explaining the effect of the stereoscopic image display apparatus according to the present invention.

Explanation of Signs of Major Parts of Drawings

100a: first micro display element

100b: second micro display element

110a: first optical path control device 110b: second optical path control device

150a: first lens 150b: second lens

  200: pupil

The present invention relates to a stereoscopic image display apparatus, and more particularly, to a stereoscopic image display apparatus which can reduce eye fatigue by implementing the eye to be focused on a stereoscopic image.

In general, three-dimensional images representing three-dimensional images depend on the principle of stereo vision through two eyes, and the parallax of two eyes, that is, binocular disparity due to the distance between two eyes that are about 65mm apart, is the most important factor of stereoscopic feeling. Can be. That is, when the human body sees 2D images associated with the left and right eyes, the two images are delivered to the brain through the retina, and the brain fuses them together to reproduce the depth and reality of the original 3D image. It is called grasterography.

Several techniques for displaying three-dimensional stereoscopic images on a two-dimensional screen using this ability have been introduced. Specifically, stereoscopic image display, glasses-free stereoscopic image display, and holographic display using special glasses. Can be mentioned.

Among these, in the stereoscopic image display method using the special glasses, as shown in Figure 1, the display element on the left eye and the right eye, respectively, and different image information (Display1, Display2) is formed in each display element to the left eye and right eye Input to, to implement a stereoscopic image using the above-described binocular parallax.

However, the two-dimensional plane image incident to the left eye and the right eye and the position where the three-dimensional stereoscopic image felt by the human being are different from each other due to the binocular disparity principle cause eye fatigue when viewing the three-dimensional stereoscopic image. There is this. That is, the focus of the eye is focused on the display device for implementing the 2D planar image, but since the eye actually sees the 3D stereoscopic image, the focus is confusing and eye fatigue occurs.

Accordingly, it is an object of the present invention to provide a stereoscopic image display device which can reduce eye fatigue by implementing an eye to be focused on a stereoscopic image.

The above object is, according to the present invention, first and second micro display elements arranged side by side spaced apart from each other; First and second lenses disposed behind the first and second micro display elements, respectively; And a first and second optical path control elements positioned between the first micro display element and the first lens and between the second micro display element and the second lens, respectively.

Here, each of the first and second micro display elements forms a different image, and the first and second optical path control elements control the paths of different images formed in the first and second micro display elements to the eyes of the viewer. The distance between the different viewing areas formed in the can be smaller than the width of the pupil of the eye.

The distance between different viewing areas may be 1 mm to 5 mm.

In addition, the distance between different viewing areas may be 1mm to 2mm.

The first and second light path control elements may be slit barriers formed by alternately forming a transmission portion for transmitting light and a blocking portion for blocking light.

In addition, the first and second optical path control elements may be lenticular lenses.

In addition, the focus of the viewer's eyes is spaced apart from the first and second micro display elements and positioned between the first and second lenses and the first and second micro display elements.

Hereinafter, with reference to the accompanying drawings will be described the present invention in more detail.

The three-dimensional image display device according to the present invention is a display device in the form of glasses in which a plurality of independent optical systems are provided for the left eye and the right eye, respectively. For example, the stereoscopic image display apparatus according to the present invention may be provided in the form of glasses, or may be a head mounted display (HMD). The stereoscopic image display device according to the present invention uses a plurality of independent optical systems for the left eye and the right eye, and supplies left eye image information to the left eye and right eye image information to form a stereoscopic image by binocular dimensional limbs. do.

Specifically, the stereoscopic image display device according to the present invention, as shown in Figure 2, the first and second micro display elements (100a, 100b) are arranged side by side spaced apart from each other; First and second lenses 150a and 150b disposed behind the first and second micro display elements 100a and 100b, respectively; First and second optical path control elements 110a and 110b positioned between the first micro display element 100a and the first lens 150a and between the second micro display element 100a and the second lens 150a, respectively. ).

The first and second micro display devices 100a and 100b are display devices for implementing a conventional two-dimensional planar image and may be liquid crystal display panels. However, the present invention is not limited thereto, and an organic light emitting diode (OLED), a plasma display panel (PDP), a field emission display (FED), a vacuum fluorescent display (VFD), and the like may also be applied.

The first and second micro display devices 100a and 100b according to the present invention implement a plurality of different images. That is, as shown in FIG. 3, the first micro display device 100a is formed by repeating stripe-type pixels, and the first image 1 and the second image 2 are alternately displayed. Is implemented. However, the first and second micro display devices 100a and 100b according to the present invention are not limited thereto and may be driven to implement two or more different images.

First and second lenses 150a and 150b are disposed behind the first and second micro display devices 100a and 100b, respectively. The first and second lenses 150a and 150b according to the present invention are provided to the user by enlarging an image output from the first and second micro display devices 100a and 100b. For example, the first and second lenses 150a and 150b may be eye piece lenses. The eye piece lens may be a concave, convex or free curved lens, or may be enlarged by using a curved reflector.

First and second optical path control elements 110a and 110b are disposed between the first micro display element 100a and the first lens 150a and between the second micro display element 100b and the second lens 150b, respectively. ) Is located. The first and second optical path control elements 110a and 110b according to the present invention control the paths of the different images 1 and 2 formed in the first and second micro display elements 100a and 100b to the eyes of the viewer. The distance d between the different viewing zones (Viewing Zone 1, Viewing Zone 2) formed in the lens is smaller than the width L of the pupil 200 of the eye. That is, different images 1 and 2 displayed on the first and second micro display devices 100a and 100b are incident on the human eye while forming a constant viewing zone. Here, the viewing zone is a luminance distribution of each of the different images 1 and 2 displayed on the first and second micro display devices 100a and 100b. The luminance distribution is drawn with the distance at the x axis as the x axis. The distance d between the different viewing zones Viewing Zone 1 and Viewing Zone 2 is a distance between vertices of the luminance distribution. In this case, the paths of the different images 1 and 2 displayed on the first and second micro display devices 100a and 100b are determined using the first and second optical path control devices 110a and 110b according to the present invention. By controlling the distance (d) of the different viewing zones (Viewing Zone 1, Viewing Zone2) formed in the pupil of the eye 200 is smaller than the width (L) of the pupil (200). Accordingly, both the first and second images 1 and 2 formed in the first and second micro display devices 100a and 100b are incident on the pupil 200 of the eye, and the focal point of the eye is the first and second eyes. The first and second lenses 150a and 150b and the first and second micro display devices 100a and 100b may be spaced apart from the micro display devices 100a and 100b. That is, by controlling the first and second optical path control elements (110a, 110b) such that this condition is satisfied, the focus of the eye is matched to the three-dimensional stereoscopic image.

In the present invention, the distance (d) of the different viewing zones (Viewing Zone 1, Viewing Zone 2) may be 1 mm to 5 mm, considering that the width L of the human pupil 200 is generally about 5 mm. . The distance (d) of the viewing zones (Viewing Zone 1, Viewing Zone 2) must be set to 1 mm to 5 mm so that different images 1 and 2 can enter the pupil 200, in which case the human eye focuses in three dimensions. To match the stereoscopic image of the.

Meanwhile, three, four or more different images may be implemented in the first and second micro display devices 100a and 100b in order to realize a three-dimensional stereoscopic image of improved quality. Even in this case, considering that the width L of the human pupil 200 is about 5 mm, the distance d of the different viewing zones (Viewing Zone 1, Viewing Zone 2) should be set to 1 mm to 2 mm. Three or more different images may be incident on the pupil 200. This is because the focus of the human eye is adjusted to the three-dimensional stereoscopic image only when different images are incident on one pupil 200. Accordingly, the fatigue of the eye of the person is reduced.

As shown in FIG. 3, the first and second optical path control elements 110a and 110b are repeatedly formed by alternately forming a transmission part T for transmitting light and a blocking part B for blocking light. It may be a slit barrier, or may be a lenticular lens. The first and second optical path control elements 110a and 110b may be manufactured using a liquid crystal display.

Hereinafter, the principle of focusing the eye on a three-dimensional stereoscopic image will be described. The principle of focusing the eye on a three-dimensional stereoscopic image is that multi-focus is implemented by the first and second optical path control elements 110a and 110b.

In the present invention, multi-focus is implemented by the following principle. As shown in FIG. 4, when the viewer focuses on the first and second micro display elements 100a and 100b, the pixels of 3 and 4 are seen, respectively, so that an image may be dually viewed. However, if the focus is set to X, the pixels of 3 and 4 are combined to make a clear image. On the other hand, when the human focus is on the Y position, the pixels of 1 and 2 are combined. Accordingly, the focus is formed at the Y position in the pixels 1 and 2, and the focus is formed at the X position in the pixels 3 and 4. In the pixels corresponding to two viewing zones (Viewing Zone 1 and Viewing Zone 2), different focuses are realized according to distances between pixels in which the same image is input. That is, if the distance between pixels in which the same image information is input among the pixels viewed in the same viewing area is short, the focal length is long, and when the distance between pixels in which the same image information is input is long, the focal length is long. The focal length here is the distance between the human eye and the focal point. Accordingly, when a variety of images are generated in the first and second micro display devices 100a and 100b, multi focus is realized, and the generated multi focus is configured by the first and second micro display devices 100a and 100b. At a position spaced at 100b). Since the stereoscopic image is formed on the first and second micro display elements 100a and 100b, the formed multifocal point is adapted to the stereoscopic image. Thus, there is no concern for focus confusion and fatigue of the human eye is reduced.

As described above, according to the present invention, the eye may be focused on the stereoscopic image, thereby reducing eye fatigue.

Claims (7)

First and second micro display elements spaced apart from each other; First and second lenses disposed behind the first and second micro display elements, respectively; And first and second optical path control elements positioned between the first micro display element and the first lens and between the second micro display element and the second lens, respectively. The method of claim 1, Each of the first and second micro display elements forms a different image. The first and second optical path control elements control the paths of different images formed in the first and second micro display elements so that a distance between different viewing areas formed in the viewer's eyes is greater than the width of the pupil of the eye. Stereoscopic display device characterized in that to be small. The method of claim 1, The distance between the different viewing area is a stereoscopic image display device, characterized in that 1mm to 5mm. The method of claim 1, And the distance between the different viewing areas is 1 mm to 2 mm. The method of claim 1, And the first and second optical path control elements are slit barriers formed alternately with a transmission portion for transmitting light and a blocking portion for blocking light. The method of claim 1, And the first and second optical path control elements are lenticular lenses. The method of claim 2, The focus of the viewer's eye is spaced apart from the first and second micro display elements and positioned between the first and second lenses and the first and second micro display elements.

Images