KR101068348B1 - Stereoscopic image display device - Google Patents

Abstract

The present invention discloses a stereoscopic image display apparatus capable of viewing without wearing separate stereoscopic glasses, and does not cause fatigue or dizziness.
For example, a plurality of light sources including at least two light sources, the polarizers perpendicular to each other are attached to the front of each light source, and include a plurality of unit units which integrally irradiate polarizations of the light sources transmitted through the polarizer through a reflecting mirror. A light source unit; A digital micro-reflection indicator reflecting polarization of the light source unit; And a concave mirror unit configured to receive polarized light of the digital micro-reflective indicator and reflect the concave mirrors having different radii of curvature for each polarized light.

Description

Stereoscopic Display Device

The present invention relates to a stereoscopic image display.

Recently, display apparatuses capable of representing stereoscopic images have been in the spotlight. In addition, commercially available three-dimensional image expression methods adopt a method of feeling a sense of distance by showing different images in the left and right of a person. However, this method causes the inconvenience that a person must wear separate glasses. In addition, since this method shows different images in the left and right eyes, the position where the left and right eyes are in focus and the position where the actual image appears to be located are not at the same place, which causes eye fatigue and dizziness.

The present invention provides a three-dimensional image display device that can be viewed without wearing a separate three-dimensional glasses, and does not cause fatigue or dizziness.

The stereoscopic image display apparatus according to the present invention includes at least two light sources, and is formed by attaching polarizing plates perpendicular to each other in front of each light source, and integrally irradiating polarized light of the light source passing through the polarizing plate through a reflecting mirror. A light source unit including a plurality of unit units; A digital micro-reflection indicator reflecting polarization of the light source unit; And a concave mirror unit configured to receive polarized light of the digital micro-reflective indicator and reflect the concave mirrors having different radii of curvature for each polarized light.

Here, the unit of the light source unit may be provided with two pairs of light sources, and two digital micro-reflective indicators may be provided, and polarization of each pair of light sources may be irradiated to the digital micro-reflective indicators, respectively.

And the concave mirror portion comprising: a first concave mirror and a second concave mirror having different radii of curvature; And a half mirror formed between the first concave mirror and the second concave mirror to determine a reflection direction of the polarized light.

In addition, the unit unit of the concave mirror portion may be made of a number corresponding one to one to the number of unit units of the light source unit.

In the stereoscopic image display apparatus according to the present invention, the unit unit constituting the light source unit comprises at least two light sources, and a polarizing plate is provided at the front end of each light source and polarized, and then each polarized light is reflected by a concave mirror having a different radius of curvature. 3D images can be displayed by showing two images of different image distances to a human eye.

In addition, the stereoscopic image display apparatus according to the present invention may display a stereoscopic image without additional glasses, and may not cause dizziness.

In addition, the stereoscopic image display apparatus according to the present invention can display a larger number of pixels by displaying a pixel corresponding to the product of the number of unit units of the light source unit and the number of the micro mirrors of the digital micro-reflection indicator.

In addition, the stereoscopic image display apparatus according to the present invention can represent a stereoscopic image at a distance from the front of the human eye to infinity.

1 is a device diagram of a stereoscopic image display apparatus according to an embodiment of the present invention.
2 illustrates that an image is formed on a virtual screen of a stereoscopic image display apparatus according to an exemplary embodiment of the present invention.
3 is an enlarged view illustrating a light source unit of a stereoscopic image display apparatus according to an exemplary embodiment of the present invention.
4 is an enlarged view illustrating a unit unit of a light source unit.
5A to 5D illustrate a driving sequence of the digital micro-reflection indicator of the stereoscopic image display apparatus according to the embodiment of the present invention.
6 is an enlarged view illustrating a concave mirror part of a stereoscopic image display device according to an exemplary embodiment of the present invention.
7 is an enlarged view showing a unit unit constituting the concave mirror portion.
8 illustrates a process in which an image is incident and reflected on a unit unit of a concave mirror unit.
9 illustrates a relationship between a human eye and an image in the stereoscopic image display apparatus according to an embodiment of the present invention.
10 illustrates a configuration of a controller for driving a stereoscopic image display apparatus according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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.

Hereinafter, a configuration of a stereoscopic image display apparatus according to an embodiment of the present invention will be described.

1 is a device diagram of a stereoscopic image display apparatus according to an embodiment of the present invention. 2 illustrates that an image is formed on a virtual screen of a stereoscopic image display apparatus according to an exemplary embodiment of the present invention.

1 and 2, the stereoscopic image display apparatus 100 according to an exemplary embodiment of the present invention includes a light source unit 110, a digital micro-reflective display 120, and a concave mirror unit 130.

The image image irradiated from the light source unit 110 is reflected through the digital micro-reflective indicator 120, and reaches the human eye 10 through the concave mirror unit 130, thereby concave mirror unit 130. The image is displayed on a virtual screen positioned behind the screen. At this time, the image image reflected through the concave mirror 130 is such that the image having two different image distances reach the human eye 10, so that the human eye 10 recognizes as a three-dimensional image do. Hereinafter, a more detailed configuration and operation of the stereoscopic image display apparatus 100 according to an embodiment of the present invention will be described in detail.

3 is an enlarged view illustrating the light source unit 110 of the stereoscopic image display apparatus according to an exemplary embodiment of the present invention.

The light source unit 110 irradiates an image image according to an image signal received from the controller. The light source unit 110 may be made through, for example, an LED.

The light source unit 110 includes a plurality of unit units 110_11 to 110_ab. The light source unit 110 has a configuration in which a plurality of unit units 110_11 to 110_ab are arranged in a row and b column. The unit units 110_11 to 110_ab of the light source unit 110 include a x b (for example, 5000). The unit units 110_11 to 110_ab are attached to a bracket (not shown) having a concave surface having a radius of curvature of about 1 [m], and may be connected to wires through grooves formed in the bracket. The unit units 110_11 to 110_ab are positioned to face the digital micro-reflective indicator 120 positioned at the center of curvature in the concave surface of the bracket, respectively. In addition, each of the unit units (110_11 to 110_ab) has the same internal configuration, but only the position in the bracket is different, hereinafter will be described based on the unit unit (110_11) typically located in one row and one column.

4 is an enlarged view illustrating the unit unit 110_11 of the light source unit 110.

Referring to FIG. 4, the unit unit 110_11 includes four light sources 112 to 115 positioned in the case 111. The light sources 112 to 115 are inserted into and fixed to the grooves formed in the case 111.

The light sources 112 to 115 are each paired in pairs, and within each pair, the light sources 112 and 113, 114 and 115 are arranged to form an angle of approximately 90 degrees to each other. In addition, vertical polarizers 116a and 116b are positioned in front of the light sources 112, 113, 114, and 115, respectively. That is, the light irradiated from the pair of light sources 112, 113, 114, and 115 is polarized into vertical components through the polarizing plates 116a and 116b, respectively. A half mirror 117a, 117b is located between each of the pair of light sources 112, 113, 114, and 115 so that the polarized image components of the light sources 112, 113, 114, and 115 are combined to form the same. To the right direction.

In addition, another half mirror 118 is again positioned between the light source pairs 112, 113, 114, and 115, so that each pair of image components is respectively represented by each of the digital minute reflection indicators 120. 122). In addition, a convex lens 119 is further formed at the front end of the unit unit 110_11 so that the image components from each pair can be applied to each of the digital micro-reflective indicators 120 and 121 in parallel. do.

The digital micromirror indicator (DMD) 120 is formed on the front surface of the light source unit 110. The digital micro-reflective indicator 120 is located approximately at the center of curvature radius of the bracket of the light source unit 110. In addition, the digital minute reflection indicator is composed of a pair (121, 122). The digital micro-reflection indicator 120 reflects the image image incident from the light source unit 110 and applies it to the concave mirror unit 130. In addition, each of 121 and 122 constituting the digital micro-reflective indicator 120 has a space of approximately 6.5 [cm] so as to correspond to the space between the eyes 11 and 12 of the person 10. Accordingly, the image reflected from each of the digital micro-reflective indicators 121 and 122 is applied to each of the human eyes 10, 11 and 12 after being reflected by the concave mirror 130. Accordingly, the image passing through the concave mirror 130 from the digital micro-reflective indicators 121 and 122 is applied to each of the human eyes 11 and 12 to display a stereoscopic image.

Hereinafter, driving of the digital minute reflection indicator 120 will be described.

5A to 5D illustrate a driving sequence of the digital micro-reflection indicator 120 of the stereoscopic image display apparatus according to the embodiment of the present invention.

5A-5D, a driving sequence of one of the digital micro-reflective indicators 120 is shown. The digital micro-reflection indicator 121 is composed of a plurality of micro mirrors 121_11 to 121_cd. The micro mirrors 121_11 to 121_cd are arranged as c rows and d columns. That is, the micro mirrors 121_11 to 121_cd are configured as the number of c x d pieces (for example, 512 pieces).

The micro mirrors 121_11 to 121_cd may rotate to have an angle of approximately ± 12 °. Accordingly, each of the minute mirrors 121_11 to 121_cd performs a turn on or turn off operation. 5A to 5D, the turned-on ones of the minute mirrors 121_11 to 121_cd are black and the turned-off ones are displayed in white.

The digital micro-reflective indicator 120 is usually determined by the manufacturer to drive. For example, as shown in FIG. 5A, odd rows 121_11, 121_31, 121_51, and the like are sequentially turned on first in the first column, and as shown in FIG. 5B, even rows 121_21 and 121_41 are shown in FIG. 5B. , 121_61, etc.) are sequentially turned on. Subsequently, as shown in FIG. 5C, odd rows 121_12, 121_22, 121_32, and the like are sequentially turned on in the next two columns, and even rows 121_22, 121_42, 121_62, etc. are sequentially in two columns, as illustrated in FIG. 5D. By turning on, the micromirrors 121_11 to 121_cd of the entire c rows and d columns may be turned on.

In addition, in synchronization with the turn-on operation of the micro mirrors 121_11 to 121_cd, the light source unit 110 also converts an image. That is, the image of the light source unit 110 is reflected by the micro mirrors 121_11 to 121_cd, and reflected by the concave mirror unit 130 to be displayed. Therefore, the number of pixels of the stereoscopic image display apparatus 100 according to the embodiment of the present invention is axb which is the number of the unit units 110_11 to 110_ab of the light source unit 110. It is a value multiplied by cxd which is the number of (121_11 thru | or 121_cd). For example, when the number of the unit units 110_11 to 110_ab of the light source unit 110 is 5000 and the number of the micromirrors 121_11 to 121_cd of the digital micro-reflection indicator 120 is 512, the stereoscopic image display is performed. The number of pixels that the device 100 can represent is 256 million. Thus, it is possible to display the corresponding number of pixels without actually having 256 million pixels.

In addition, when the micro mirrors 121_11 to 121_cd all perform the turn-on operation once, the image reflecting the concave mirror 130 constitutes a frame. Therefore, if this operation is repeated 60 times per minute, an image can be produced.

The concave mirror unit 130 is formed at the lower end of the light source unit 110. The bracket (not shown) in which the concave mirror part 130 is formed has a radius of curvature substantially the same as that of the light source part 110, and is positioned with the digital micro-reflection indicator 120 as a center of curvature radius. The concave mirror unit 130 reflects the image irradiated from the digital minute reflection indicator 120 and applies it to the eyes 11 and 12 of the person 10.

6 is an enlarged view of the concave mirror 130 of the stereoscopic image display apparatus according to the embodiment of the present invention. Referring to FIG. 6, the concave mirror unit 130 includes unit units 130_11 to 130_ab having a number corresponding to one to one of the unit units 110_11 to 110_ab of the light source unit 110. The concave mirror 130 reflects the image irradiated from the digital micro-reflective indicator 120, thereby forming a virtual screen behind the concave mirror 120.

7 is an enlarged view showing a unit unit constituting the concave mirror portion. 8 illustrates a process in which an image is incident and reflected on a unit unit of a concave mirror unit.

First, referring to FIG. 7, the unit units 130_11 to 130_ab constituting the concave mirror 130 may include one half mirror 131, a first concave mirror 132, and a second concave mirror 133. It is made to include. The half mirror 131 is positioned between the first concave mirror 132 and the second concave mirror 133, and the first concave mirror 132 and the second concave mirror 133 have an angle of approximately 90 degrees. It is formed while forming. The half mirror 131 transmits one component of the polarized image of the light source unit 110 and reflects the other component. The concave mirrors 132 and 133 have different radii of curvature.

Referring to FIG. 8, first, an image incident from the digital micro-reflection indicator 120 is incident on a unit unit (eg, 130_11) of the concave mirror unit 130. In addition, the image is composed of two components perpendicular to each other by the polarizing plates 116a and 116b transmitted when starting from the light source unit 110. One of the components passes through the half mirror 131 along the path ① to reach the first concave mirror 132, and the other component is bent by the half mirror 131 to be ②. Along the path the second concave mirror 133 is reached. The components reflected from the first concave mirror 132 are combined along the path ③ and the components reflected from the second concave mirror 133 are applied along the path ④ to the eyes 11 and 12 of the person 10. do.

At this time, since the first concave mirror 132 and the second concave mirror 133 have different radii of curvature, the components of the image are recognized as being at different object distances L1 and L2. As a result, the human eyes 11 and 12 perceive the image in three dimensions. A more detailed description thereof will be described later.

9 illustrates a relationship between a human eye and an image in the stereoscopic image display apparatus according to an embodiment of the present invention.

In FIG. 9, the length of the eyeball in the human eye 11 is defined as l, the diameter of the pupil d, and the diameter of the eye cell t. Further, it is assumed that one component of the image reaching the human eye 11 through the above configuration is located at the distance of the object distance L1 on the virtual screen, and the other component is located at L2. Then, the image passing through the human pupil is located at an image distance l1 and l2 from the pupil, respectively. At this time, if light of the same intensity is applied in L1 and L2, the human eye 11 focuses on the middle L. Also, in this case, the light from L1 and L2 is slightly spread by the pupil focused on L as shown in FIG. 9 without forming an accurate image on the cell. The two images combine to control the pupil so that the circle of least confusion reaches the cell. Therefore, by adjusting the intensity of the light coming from L1 and L2, the human eye 11 can focus the image anywhere between L1 and L2, thereby feeling a sense of distance and three-dimensional.

As discussed above, in the stereoscopic image display apparatus 100 according to the exemplary embodiment of the present invention, the unit units 110_11 to 110_ab of the light source unit 110 each have a pair of light sources 112 and 113 or 114 and 115 constituting the same. After passing through the polarizing plates 116a and 116b which are perpendicular to each other, the reflections are respectively reflected by the first concave mirror 132 and the second concave mirror 133 of the concave mirror part 130, and thus, different distances L1. , L2). Accordingly, according to the discussion of FIG. 9, the human eyes 11 and 12 may feel distance and stereoscopic feeling in the image of the stereoscopic image display apparatus 100 according to the exemplary embodiment of the present invention.

In this case, if the human eye 11 is focused on L, the following lens equation holds.

<Equation 1>

(f는 초점 거리)

(f is the focal length)

In addition, the light from L1 converges at the position of l1 through the human pupil, spreads slightly and is distributed to the cell having a diameter of t, and the following lens equation is established.

<Formula 2>

At this time, since the eye cell of the retina is not an ideal point, but has a diameter of t, the human eye 11 can recognize it as an image without difficulty.

In addition, the light from L2 satisfies the following lens equation.

<Equation 3>

Then, when the focal length of the viewer's eyes is f, the sections L1-L2 in the image space in which the natural image can be viewed can be obtained by the following equation.

<Equation 4>

And the diameter of the eye cell is 5 [㎛], the pupil size is 4 [mm], the eye length is 17.5 [mm] and the approximate value is obtained as follows.

<Equation 5>

<Equation 6>

In the above formula, n is a natural number, and if a virtual screen can be created according to the distance, the image can naturally express an image from in front of the human eyes 11 and 12 to infinity.

Hereinafter, a driving method of a stereoscopic image display apparatus according to an exemplary embodiment of the present invention will be described.

10 illustrates a configuration of a controller for driving a stereoscopic image display apparatus according to an embodiment of the present invention.

Referring to FIG. 10, the controller 140 for controlling the driving of the stereoscopic image display apparatus 100 according to an exemplary embodiment of the present invention may include a multiplexer 141, shift registers 142 to 145, and a D / A converter 146. 147).

First, a multiplexer 141 separates serial data and applies it to the shift registers 142 to 145. The shift registers 142 to 145 are composed of two pairs, so that while the pair of registers (for example, 142 and 143) are being applied to the light source unit 110, the remaining pairs of registers 144 and 145 are data. The time can be saved by performing the loaded operation. Also, in each pair of registers (eg, 142, 143), one 142 is involved in the brightness of the image and the other 143 is involved in the distance of the image. That is, the data applied to the light source unit 110 is formed of 2 bytes, 1 byte of which divides the brightness of the image into 256 levels, and the remaining 1 byte can divide the brightness into 256 again to give a sense of distance. . In addition, the D / A converters 146 and 147 are provided in two, one of which is applied to the light sources 112, 113, 114, and 115 constituting each unit unit 110_11 to 110_ab of the light source unit 110. The other applies to distributing light to two virtual screens at a given brightness.

What has been described above is only one embodiment for implementing the stereoscopic image display apparatus according to the present invention, and the present invention is not limited to the above embodiment, and as claimed in the following claims, the gist of the present invention Without departing from the scope of the present invention, any person having ordinary skill in the art will have the technical spirit of the present invention to the extent that various modifications can be made.

100; Stereoscopic image display device
110; Light source units 110_11 to 110_ab; Unit
112 to 115; Light sources 116a and 116b; Polarizer
117a, 117b, 118; Half mirror 120; Digital smile reflection indicator
121_11 to 121_cd; Reflective mirror 130; Concave mirror
130_11 to 130_ab; Unit unit 131; Half mirror
132; First concave mirror 133; 2nd concave mirror
140; Control unit 141; Multiplexer
142 to 145; Shift registers 146, 147; D / A Converter
10; Person 11, 12; Human eye

Claims (4)

A light source unit including at least two light sources, the polarizers being perpendicular to each other in front of each light source, and including a plurality of unit units which integrally irradiate the polarizations of the light sources transmitted through the polarizers through a reflection mirror;
A digital micro-reflection indicator reflecting polarization of the light source unit; And
And a concave mirror unit configured to receive polarized light of the digital micro-reflective indicator and reflect the concave mirrors having different radii of curvature for each polarized light. The method of claim 1,
The unit unit of the light source unit is provided with two pairs of light sources, two digital micro-reflective indicator is provided, the polarization of each pair of light sources are irradiated to the digital micro-reflective indicator, respectively. The method of claim 1,
The concave mirror portion
A first concave mirror and a second concave mirror having different radii of curvature; And
And a plurality of unit units including a half mirror formed between the first concave mirror and the second concave mirror to determine a reflection direction of the polarized light. The method of claim 3, wherein
And a unit unit of the concave mirror portion is a number corresponding one to one to the number of unit units of the light source unit.

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